21003925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{677}}^1$

素因数の和:777

約数の個数: 24

約数和(自身を含む): 27995976

約数和(自身を除く): 6992051

約数列:

[1, 5, 17, 25, 73, 85, 365, 425, 677, 1241, 1825, 3385, 6205, 11509, 16925, 31025, 49421, 57545, 247105, 287725, 840157, 1235525, 4200785, 21003925]

約数ペア:

[(1, 21003925), (5, 4200785), (17, 1235525), (25, 840157), (73, 287725), (85, 247105), (365, 57545), (425, 49421), (677, 31025), (1241, 16925), (1825, 11509), (3385, 6205)]