21285710

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^2\times {\mathrm{2531}}^1$

素因数の和:2596

約数の個数: 24

約数和(自身を含む): 39696696

約数和(自身を除く): 18410986

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 841, 1682, 2531, 4205, 5062, 8410, 12655, 25310, 73399, 146798, 366995, 733990, 2128571, 4257142, 10642855, 21285710]

約数ペア:

[(1, 21285710), (2, 10642855), (5, 4257142), (10, 2128571), (29, 733990), (58, 366995), (145, 146798), (290, 73399), (841, 25310), (1682, 12655), (2531, 8410), (4205, 5062)]