90243025

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{661}}^1$

素因数の和:841

約数の個数: 24

約数和(自身を含む): 115579904

約数和(自身を除く): 25336879

約数列:

[1, 5, 25, 43, 127, 215, 635, 661, 1075, 3175, 3305, 5461, 16525, 27305, 28423, 83947, 136525, 142115, 419735, 710575, 2098675, 3609721, 18048605, 90243025]

約数ペア:

[(1, 90243025), (5, 18048605), (25, 3609721), (43, 2098675), (127, 710575), (215, 419735), (635, 142115), (661, 136525), (1075, 83947), (3175, 28423), (3305, 27305), (5461, 16525)]