20215975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3659}}^1$

素因数の和:3699

約数の個数: 24

約数和(自身を含む): 28591920

約数和(自身を除く): 8375945

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3659, 5525, 18295, 47567, 62203, 91475, 237835, 311015, 808639, 1189175, 1555075, 4043195, 20215975]

約数ペア:

[(1, 20215975), (5, 4043195), (13, 1555075), (17, 1189175), (25, 808639), (65, 311015), (85, 237835), (221, 91475), (325, 62203), (425, 47567), (1105, 18295), (3659, 5525)]