21513420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1117}}^1$

素因数の和:1239

約数の個数: 72

約数和(自身を含む): 65926224

約数和(自身を除く): 44412804

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 107, 180, 214, 321, 428, 535, 642, 963, 1070, 1117, 1284, 1605, 1926, 2140, 2234, 3210, 3351, 3852, 4468, 4815, 5585, 6420, 6702, 9630, 10053, 11170, 13404, 16755, 19260, 20106, 22340, 33510, 40212, 50265, 67020, 100530, 119519, 201060, 239038, 358557, 478076, 597595, 717114, 1075671, 1195190, 1434228, 1792785, 2151342, 2390380, 3585570, 4302684, 5378355, 7171140, 10756710, 21513420]

約数ペア:

[(1, 21513420), (2, 10756710), (3, 7171140), (4, 5378355), (5, 4302684), (6, 3585570), (9, 2390380), (10, 2151342), (12, 1792785), (15, 1434228), (18, 1195190), (20, 1075671), (30, 717114), (36, 597595), (45, 478076), (60, 358557), (90, 239038), (107, 201060), (180, 119519), (214, 100530), (321, 67020), (428, 50265), (535, 40212), (642, 33510), (963, 22340), (1070, 20106), (1117, 19260), (1284, 16755), (1605, 13404), (1926, 11170), (2140, 10053), (2234, 9630), (3210, 6702), (3351, 6420), (3852, 5585), (4468, 4815)]