21445721

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{1571}}^1$

素因数の和:1672

約数の個数: 16

約数和(自身を含む): 25126848

約数和(自身を除く): 3681127

約数列:

[1, 11, 17, 73, 187, 803, 1241, 1571, 13651, 17281, 26707, 114683, 293777, 1261513, 1949611, 21445721]

約数ペア:

[(1, 21445721), (11, 1949611), (17, 1261513), (73, 293777), (187, 114683), (803, 26707), (1241, 17281), (1571, 13651)]