21251120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:115

約数の個数: 160

約数和(自身を含む): 59996160

約数和(自身を除く): 38745040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 31, 38, 40, 41, 44, 55, 62, 76, 80, 82, 88, 95, 110, 124, 152, 155, 164, 176, 190, 205, 209, 220, 248, 304, 310, 328, 341, 380, 410, 418, 440, 451, 496, 589, 620, 656, 682, 760, 779, 820, 836, 880, 902, 1045, 1178, 1240, 1271, 1364, 1520, 1558, 1640, 1672, 1705, 1804, 2090, 2255, 2356, 2480, 2542, 2728, 2945, 3116, 3280, 3344, 3410, 3608, 3895, 4180, 4510, 4712, 5084, 5456, 5890, 6232, 6355, 6479, 6820, 7216, 7790, 8360, 8569, 9020, 9424, 10168, 11780, 12464, 12710, 12958, 13640, 13981, 15580, 16720, 17138, 18040, 20336, 23560, 24149, 25420, 25916, 27280, 27962, 31160, 32395, 34276, 36080, 42845, 47120, 48298, 50840, 51832, 55924, 62320, 64790, 68552, 69905, 85690, 96596, 101680, 103664, 111848, 120745, 129580, 137104, 139810, 171380, 193192, 223696, 241490, 259160, 265639, 279620, 342760, 386384, 482980, 518320, 531278, 559240, 685520, 965960, 1062556, 1118480, 1328195, 1931920, 2125112, 2656390, 4250224, 5312780, 10625560, 21251120]

約数ペア:

[(1, 21251120), (2, 10625560), (4, 5312780), (5, 4250224), (8, 2656390), (10, 2125112), (11, 1931920), (16, 1328195), (19, 1118480), (20, 1062556), (22, 965960), (31, 685520), (38, 559240), (40, 531278), (41, 518320), (44, 482980), (55, 386384), (62, 342760), (76, 279620), (80, 265639), (82, 259160), (88, 241490), (95, 223696), (110, 193192), (124, 171380), (152, 139810), (155, 137104), (164, 129580), (176, 120745), (190, 111848), (205, 103664), (209, 101680), (220, 96596), (248, 85690), (304, 69905), (310, 68552), (328, 64790), (341, 62320), (380, 55924), (410, 51832), (418, 50840), (440, 48298), (451, 47120), (496, 42845), (589, 36080), (620, 34276), (656, 32395), (682, 31160), (760, 27962), (779, 27280), (820, 25916), (836, 25420), (880, 24149), (902, 23560), (1045, 20336), (1178, 18040), (1240, 17138), (1271, 16720), (1364, 15580), (1520, 13981), (1558, 13640), (1640, 12958), (1672, 12710), (1705, 12464), (1804, 11780), (2090, 10168), (2255, 9424), (2356, 9020), (2480, 8569), (2542, 8360), (2728, 7790), (2945, 7216), (3116, 6820), (3280, 6479), (3344, 6355), (3410, 6232), (3608, 5890), (3895, 5456), (4180, 5084), (4510, 4712)]