20797985

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{151}}^1\times {\mathrm{163}}^1$

素因数の和:345

約数の個数: 24

約数和(自身を含む): 27370944

約数和(自身を除く): 6572959

約数列:

[1, 5, 13, 65, 151, 163, 169, 755, 815, 845, 1963, 2119, 9815, 10595, 24613, 25519, 27547, 123065, 127595, 137735, 319969, 1599845, 4159597, 20797985]

約数ペア:

[(1, 20797985), (5, 4159597), (13, 1599845), (65, 319969), (151, 137735), (163, 127595), (169, 123065), (755, 27547), (815, 25519), (845, 24613), (1963, 10595), (2119, 9815)]