21289985

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{733}}^1$

素因数の和:932

約数の個数: 16

約数和(自身を含む): 26441616

約数和(自身を除く): 5151631

約数列:

[1, 5, 37, 157, 185, 733, 785, 3665, 5809, 27121, 29045, 115081, 135605, 575405, 4257997, 21289985]

約数ペア:

[(1, 21289985), (5, 4257997), (37, 575405), (157, 135605), (185, 115081), (733, 29045), (785, 27121), (3665, 5809)]