21906577

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{419}}^1$

素因数の和:541

約数の個数: 24

約数和(自身を含む): 28153440

約数和(自身を除く): 6246863

約数列:

[1, 7, 11, 49, 77, 97, 419, 539, 679, 1067, 2933, 4609, 4753, 7469, 20531, 32263, 40643, 52283, 225841, 284501, 447073, 1991507, 3129511, 21906577]

約数ペア:

[(1, 21906577), (7, 3129511), (11, 1991507), (49, 447073), (77, 284501), (97, 225841), (419, 52283), (539, 40643), (679, 32263), (1067, 20531), (2933, 7469), (4609, 4753)]