21578680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28393}}^1$

素因数の和:28423

約数の個数: 32

約数和(自身を含む): 51109200

約数和(自身を除く): 29530520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28393, 56786, 113572, 141965, 227144, 283930, 539467, 567860, 1078934, 1135720, 2157868, 2697335, 4315736, 5394670, 10789340, 21578680]

約数ペア:

[(1, 21578680), (2, 10789340), (4, 5394670), (5, 4315736), (8, 2697335), (10, 2157868), (19, 1135720), (20, 1078934), (38, 567860), (40, 539467), (76, 283930), (95, 227144), (152, 141965), (190, 113572), (380, 56786), (760, 28393)]