21557980

素因数分解:

$2^2\times 5^1\times {\mathrm{617}}^1\times {\mathrm{1747}}^1$

素因数の和:2373

約数の個数: 24

約数和(自身を含む): 45371088

約数和(自身を除く): 23813108

約数列:

[1, 2, 4, 5, 10, 20, 617, 1234, 1747, 2468, 3085, 3494, 6170, 6988, 8735, 12340, 17470, 34940, 1077899, 2155798, 4311596, 5389495, 10778990, 21557980]

約数ペア:

[(1, 21557980), (2, 10778990), (4, 5389495), (5, 4311596), (10, 2155798), (20, 1077899), (617, 34940), (1234, 17470), (1747, 12340), (2468, 8735), (3085, 6988), (3494, 6170)]