21279995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{10457}}^1$

素因数の和:10510

約数の個数: 16

約数和(自身を含む): 28613088

約数和(自身を除く): 7333093

約数列:

[1, 5, 11, 37, 55, 185, 407, 2035, 10457, 52285, 115027, 386909, 575135, 1934545, 4255999, 21279995]

約数ペア:

[(1, 21279995), (5, 4255999), (11, 1934545), (37, 575135), (55, 386909), (185, 115027), (407, 52285), (2035, 10457)]