12981025

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 16733304

約数和(自身を除く): 3752279

約数列:

[1, 5, 25, 53, 97, 101, 265, 485, 505, 1325, 2425, 2525, 5141, 5353, 9797, 25705, 26765, 48985, 128525, 133825, 244925, 519241, 2596205, 12981025]

約数ペア:

[(1, 12981025), (5, 2596205), (25, 519241), (53, 244925), (97, 133825), (101, 128525), (265, 48985), (485, 26765), (505, 25705), (1325, 9797), (2425, 5353), (2525, 5141)]