20649941

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:213

約数の個数: 24

約数和(自身を含む): 24156000

約数和(自身を除く): 3506059

約数列:

[1, 13, 19, 59, 109, 169, 247, 767, 1121, 1417, 2071, 3211, 6431, 9971, 14573, 18421, 26923, 83603, 122189, 189449, 349999, 1086839, 1588457, 20649941]

約数ペア:

[(1, 20649941), (13, 1588457), (19, 1086839), (59, 349999), (109, 189449), (169, 122189), (247, 83603), (767, 26923), (1121, 18421), (1417, 14573), (2071, 9971), (3211, 6431)]