21237715

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{983}}^1$

素因数の和:1166

約数の個数: 16

約数和(自身を含む): 26568000

約数和(自身を除く): 5330285

約数列:

[1, 5, 29, 145, 149, 745, 983, 4321, 4915, 21605, 28507, 142535, 146467, 732335, 4247543, 21237715]

約数ペア:

[(1, 21237715), (5, 4247543), (29, 732335), (145, 146467), (149, 142535), (745, 28507), (983, 21605), (4321, 4915)]