21296285

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1\times {\mathrm{421}}^1$

素因数の和:644

約数の個数: 16

約数和(自身を含む): 26170752

約数和(自身を除く): 4874467

約数列:

[1, 5, 67, 151, 335, 421, 755, 2105, 10117, 28207, 50585, 63571, 141035, 317855, 4259257, 21296285]

約数ペア:

[(1, 21296285), (5, 4259257), (67, 317855), (151, 141035), (335, 63571), (421, 50585), (755, 28207), (2105, 10117)]