20999620

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5801}}^1$

素因数の和:5991

約数の個数: 24

約数和(自身を含む): 44350488

約数和(自身を除く): 23350868

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5801, 11602, 23204, 29005, 58010, 116020, 1049981, 2099962, 4199924, 5249905, 10499810, 20999620]

約数ペア:

[(1, 20999620), (2, 10499810), (4, 5249905), (5, 4199924), (10, 2099962), (20, 1049981), (181, 116020), (362, 58010), (724, 29005), (905, 23204), (1810, 11602), (3620, 5801)]