388551520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{31}}^2$

素因数の和:122

約数の個数: 216

約数和(自身を含む): 1144078992

約数和(自身を除く): 755527472

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 31, 32, 35, 38, 40, 56, 62, 70, 76, 80, 95, 112, 124, 133, 140, 152, 155, 160, 190, 217, 224, 248, 266, 280, 304, 310, 361, 380, 434, 496, 532, 560, 589, 608, 620, 665, 722, 760, 868, 961, 992, 1064, 1085, 1120, 1178, 1240, 1330, 1444, 1520, 1736, 1805, 1922, 2128, 2170, 2356, 2480, 2527, 2660, 2888, 2945, 3040, 3472, 3610, 3844, 4123, 4256, 4340, 4712, 4805, 4960, 5054, 5320, 5776, 5890, 6727, 6944, 7220, 7688, 8246, 8680, 9424, 9610, 10108, 10640, 11191, 11552, 11780, 12635, 13454, 14440, 15376, 16492, 17360, 18259, 18848, 19220, 20216, 20615, 21280, 22382, 23560, 25270, 26908, 28880, 30752, 32984, 33635, 34720, 36518, 38440, 40432, 41230, 44764, 47120, 50540, 53816, 55955, 57760, 65968, 67270, 73036, 76880, 78337, 80864, 82460, 89528, 91295, 94240, 101080, 107632, 111910, 127813, 131936, 134540, 146072, 153760, 156674, 164920, 179056, 182590, 202160, 215264, 223820, 255626, 269080, 292144, 313348, 329840, 346921, 358112, 365180, 391685, 404320, 447640, 511252, 538160, 584288, 626696, 639065, 659680, 693842, 730360, 783370, 895280, 1022504, 1076320, 1253392, 1278130, 1387684, 1460720, 1566740, 1734605, 1790560, 2045008, 2428447, 2506784, 2556260, 2775368, 2921440, 3133480, 3469210, 4090016, 4856894, 5112520, 5550736, 6266960, 6938420, 9713788, 10225040, 11101472, 12142235, 12533920, 13876840, 19427576, 20450080, 24284470, 27753680, 38855152, 48568940, 55507360, 77710304, 97137880, 194275760, 388551520]

約数ペア:

[(1, 388551520), (2, 194275760), (4, 97137880), (5, 77710304), (7, 55507360), (8, 48568940), (10, 38855152), (14, 27753680), (16, 24284470), (19, 20450080), (20, 19427576), (28, 13876840), (31, 12533920), (32, 12142235), (35, 11101472), (38, 10225040), (40, 9713788), (56, 6938420), (62, 6266960), (70, 5550736), (76, 5112520), (80, 4856894), (95, 4090016), (112, 3469210), (124, 3133480), (133, 2921440), (140, 2775368), (152, 2556260), (155, 2506784), (160, 2428447), (190, 2045008), (217, 1790560), (224, 1734605), (248, 1566740), (266, 1460720), (280, 1387684), (304, 1278130), (310, 1253392), (361, 1076320), (380, 1022504), (434, 895280), (496, 783370), (532, 730360), (560, 693842), (589, 659680), (608, 639065), (620, 626696), (665, 584288), (722, 538160), (760, 511252), (868, 447640), (961, 404320), (992, 391685), (1064, 365180), (1085, 358112), (1120, 346921), (1178, 329840), (1240, 313348), (1330, 292144), (1444, 269080), (1520, 255626), (1736, 223820), (1805, 215264), (1922, 202160), (2128, 182590), (2170, 179056), (2356, 164920), (2480, 156674), (2527, 153760), (2660, 146072), (2888, 134540), (2945, 131936), (3040, 127813), (3472, 111910), (3610, 107632), (3844, 101080), (4123, 94240), (4256, 91295), (4340, 89528), (4712, 82460), (4805, 80864), (4960, 78337), (5054, 76880), (5320, 73036), (5776, 67270), (5890, 65968), (6727, 57760), (6944, 55955), (7220, 53816), (7688, 50540), (8246, 47120), (8680, 44764), (9424, 41230), (9610, 40432), (10108, 38440), (10640, 36518), (11191, 34720), (11552, 33635), (11780, 32984), (12635, 30752), (13454, 28880), (14440, 26908), (15376, 25270), (16492, 23560), (17360, 22382), (18259, 21280), (18848, 20615), (19220, 20216)]