21277580

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{8377}}^1$

素因数の和:8513

約数の個数: 24

約数和(自身を含む): 45040128

約数和(自身を除く): 23762548

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 8377, 16754, 33508, 41885, 83770, 167540, 1063879, 2127758, 4255516, 5319395, 10638790, 21277580]

約数ペア:

[(1, 21277580), (2, 10638790), (4, 5319395), (5, 4255516), (10, 2127758), (20, 1063879), (127, 167540), (254, 83770), (508, 41885), (635, 33508), (1270, 16754), (2540, 8377)]