21409717

素因数分解:

$7^4\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:306

約数の個数: 20

約数和(自身を含む): 25757996

約数和(自身を除く): 4348279

約数列:

[1, 7, 37, 49, 241, 259, 343, 1687, 1813, 2401, 8917, 11809, 12691, 62419, 82663, 88837, 436933, 578641, 3058531, 21409717]

約数ペア:

[(1, 21409717), (7, 3058531), (37, 578641), (49, 436933), (241, 88837), (259, 82663), (343, 62419), (1687, 12691), (1813, 11809), (2401, 8917)]