21156020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17341}}^1$

素因数の和:17411

約数の個数: 24

約数和(自身を含む): 45158568

約数和(自身を除く): 24002548

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17341, 34682, 69364, 86705, 173410, 346820, 1057801, 2115602, 4231204, 5289005, 10578010, 21156020]

約数ペア:

[(1, 21156020), (2, 10578010), (4, 5289005), (5, 4231204), (10, 2115602), (20, 1057801), (61, 346820), (122, 173410), (244, 86705), (305, 69364), (610, 34682), (1220, 17341)]