21433727

素因数分解:

$7^4\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:220

約数の個数: 20

約数和(自身を含む): 25545120

約数和(自身を除く): 4111393

約数列:

[1, 7, 49, 79, 113, 343, 553, 791, 2401, 3871, 5537, 8927, 27097, 38759, 62489, 189679, 271313, 437423, 3061961, 21433727]

約数ペア:

[(1, 21433727), (7, 3061961), (49, 437423), (79, 271313), (113, 189679), (343, 62489), (553, 38759), (791, 27097), (2401, 8927), (3871, 5537)]