21519560

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2251}}^1$

素因数の和:2501

約数の個数: 32

約数和(自身を含む): 48643200

約数和(自身を除く): 27123640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2251, 2390, 4502, 4780, 9004, 9560, 11255, 18008, 22510, 45020, 90040, 537989, 1075978, 2151956, 2689945, 4303912, 5379890, 10759780, 21519560]

約数ペア:

[(1, 21519560), (2, 10759780), (4, 5379890), (5, 4303912), (8, 2689945), (10, 2151956), (20, 1075978), (40, 537989), (239, 90040), (478, 45020), (956, 22510), (1195, 18008), (1912, 11255), (2251, 9560), (2390, 9004), (4502, 4780)]