1221161920

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^2$

素因数の和:128

約数の個数: 252

約数和(自身を含む): 3459476952

約数和(自身を除く): 2238315032

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 31, 32, 38, 40, 44, 55, 62, 64, 76, 80, 88, 95, 110, 124, 152, 155, 160, 176, 190, 209, 220, 248, 304, 310, 320, 341, 352, 361, 380, 418, 440, 496, 589, 608, 620, 682, 704, 722, 760, 836, 880, 961, 992, 1045, 1178, 1216, 1240, 1364, 1444, 1520, 1672, 1705, 1760, 1805, 1922, 1984, 2090, 2356, 2480, 2728, 2888, 2945, 3040, 3344, 3410, 3520, 3610, 3844, 3971, 4180, 4712, 4805, 4960, 5456, 5776, 5890, 6080, 6479, 6688, 6820, 7220, 7688, 7942, 8360, 9424, 9610, 9920, 10571, 10912, 11191, 11552, 11780, 12958, 13376, 13640, 14440, 15376, 15884, 16720, 18259, 18848, 19220, 19855, 21142, 21824, 22382, 23104, 23560, 25916, 27280, 28880, 30752, 31768, 32395, 33440, 36518, 37696, 38440, 39710, 42284, 44764, 47120, 51832, 52855, 54560, 55955, 57760, 61504, 63536, 64790, 66880, 73036, 76880, 79420, 84568, 89528, 91295, 94240, 103664, 105710, 109120, 111910, 115520, 123101, 127072, 129580, 146072, 153760, 158840, 169136, 179056, 182590, 188480, 200849, 207328, 211420, 223820, 246202, 254144, 259160, 292144, 307520, 317680, 338272, 346921, 358112, 365180, 401698, 414656, 422840, 447640, 492404, 518320, 584288, 615505, 635360, 676544, 693842, 716224, 730360, 803396, 845680, 895280, 984808, 1004245, 1036640, 1168576, 1231010, 1270720, 1387684, 1460720, 1606792, 1691360, 1734605, 1790560, 1969616, 2008490, 2073280, 2462020, 2775368, 2921440, 3213584, 3382720, 3469210, 3581120, 3816131, 3939232, 4016980, 4924040, 5550736, 5842880, 6427168, 6938420, 7632262, 7878464, 8033960, 9848080, 11101472, 12854336, 13876840, 15264524, 16067920, 19080655, 19696160, 22202944, 27753680, 30529048, 32135840, 38161310, 39392320, 55507360, 61058096, 64271680, 76322620, 111014720, 122116192, 152645240, 244232384, 305290480, 610580960, 1221161920]

約数ペア:

[(1, 1221161920), (2, 610580960), (4, 305290480), (5, 244232384), (8, 152645240), (10, 122116192), (11, 111014720), (16, 76322620), (19, 64271680), (20, 61058096), (22, 55507360), (31, 39392320), (32, 38161310), (38, 32135840), (40, 30529048), (44, 27753680), (55, 22202944), (62, 19696160), (64, 19080655), (76, 16067920), (80, 15264524), (88, 13876840), (95, 12854336), (110, 11101472), (124, 9848080), (152, 8033960), (155, 7878464), (160, 7632262), (176, 6938420), (190, 6427168), (209, 5842880), (220, 5550736), (248, 4924040), (304, 4016980), (310, 3939232), (320, 3816131), (341, 3581120), (352, 3469210), (361, 3382720), (380, 3213584), (418, 2921440), (440, 2775368), (496, 2462020), (589, 2073280), (608, 2008490), (620, 1969616), (682, 1790560), (704, 1734605), (722, 1691360), (760, 1606792), (836, 1460720), (880, 1387684), (961, 1270720), (992, 1231010), (1045, 1168576), (1178, 1036640), (1216, 1004245), (1240, 984808), (1364, 895280), (1444, 845680), (1520, 803396), (1672, 730360), (1705, 716224), (1760, 693842), (1805, 676544), (1922, 635360), (1984, 615505), (2090, 584288), (2356, 518320), (2480, 492404), (2728, 447640), (2888, 422840), (2945, 414656), (3040, 401698), (3344, 365180), (3410, 358112), (3520, 346921), (3610, 338272), (3844, 317680), (3971, 307520), (4180, 292144), (4712, 259160), (4805, 254144), (4960, 246202), (5456, 223820), (5776, 211420), (5890, 207328), (6080, 200849), (6479, 188480), (6688, 182590), (6820, 179056), (7220, 169136), (7688, 158840), (7942, 153760), (8360, 146072), (9424, 129580), (9610, 127072), (9920, 123101), (10571, 115520), (10912, 111910), (11191, 109120), (11552, 105710), (11780, 103664), (12958, 94240), (13376, 91295), (13640, 89528), (14440, 84568), (15376, 79420), (15884, 76880), (16720, 73036), (18259, 66880), (18848, 64790), (19220, 63536), (19855, 61504), (21142, 57760), (21824, 55955), (22382, 54560), (23104, 52855), (23560, 51832), (25916, 47120), (27280, 44764), (28880, 42284), (30752, 39710), (31768, 38440), (32395, 37696), (33440, 36518)]