21490651

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1699}}^1$

素因数の和:1858

約数の個数: 16

約数和(自身を含む): 26656000

約数和(自身を除く): 5165349

約数列:

[1, 7, 13, 91, 139, 973, 1699, 1807, 11893, 12649, 22087, 154609, 236161, 1653127, 3070093, 21490651]

約数ペア:

[(1, 21490651), (7, 3070093), (13, 1653127), (91, 236161), (139, 154609), (973, 22087), (1699, 12649), (1807, 11893)]