21228335

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{907}}^1$

素因数の和:1094

約数の個数: 16

約数和(自身を含む): 26499072

約数和(自身を除く): 5270737

約数列:

[1, 5, 31, 151, 155, 755, 907, 4535, 4681, 23405, 28117, 136957, 140585, 684785, 4245667, 21228335]

約数ペア:

[(1, 21228335), (5, 4245667), (31, 684785), (151, 140585), (155, 136957), (755, 28117), (907, 23405), (4535, 4681)]