21223657

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^2\times {\mathrm{67}}^1$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 26968256

約数和(自身を除く): 5744599

約数列:

[1, 7, 13, 59, 67, 91, 413, 469, 767, 871, 3481, 3953, 5369, 6097, 24367, 27671, 45253, 51389, 233227, 316771, 359723, 1632589, 3031951, 21223657]

約数ペア:

[(1, 21223657), (7, 3031951), (13, 1632589), (59, 359723), (67, 316771), (91, 233227), (413, 51389), (469, 45253), (767, 27671), (871, 24367), (3481, 6097), (3953, 5369)]