31981025

素因数分解:

$5^2\times {\mathrm{41}}^2\times {\mathrm{761}}^1$

素因数の和:853

約数の個数: 18

約数和(自身を含む): 40700706

約数和(自身を除く): 8719681

約数列:

[1, 5, 25, 41, 205, 761, 1025, 1681, 3805, 8405, 19025, 31201, 42025, 156005, 780025, 1279241, 6396205, 31981025]

約数ペア:

[(1, 31981025), (5, 6396205), (25, 1279241), (41, 780025), (205, 156005), (761, 42025), (1025, 31201), (1681, 19025), (3805, 8405)]