394020907

素因数分解:

$7^4\times {\mathrm{379}}^1\times {\mathrm{433}}^1$

素因数の和:840

約数の個数: 20

約数和(自身を含む): 461940920

約数和(自身を除く): 67920013

約数列:

[1, 7, 49, 343, 379, 433, 2401, 2653, 3031, 18571, 21217, 129997, 148519, 164107, 909979, 1039633, 1148749, 8041243, 56288701, 394020907]

約数ペア:

[(1, 394020907), (7, 56288701), (49, 8041243), (343, 1148749), (379, 1039633), (433, 909979), (2401, 164107), (2653, 148519), (3031, 129997), (18571, 21217)]