21891605

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{1621}}^1$

素因数の和:1736

約数の個数: 16

約数和(自身を含む): 27366384

約数和(自身を除く): 5474779

約数列:

[1, 5, 37, 73, 185, 365, 1621, 2701, 8105, 13505, 59977, 118333, 299885, 591665, 4378321, 21891605]

約数ペア:

[(1, 21891605), (5, 4378321), (37, 591665), (73, 299885), (185, 118333), (365, 59977), (1621, 13505), (2701, 8105)]