20217925

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8887}}^1$

素因数の和:8917

約数の個数: 24

約数和(自身を含む): 30859136

約数和(自身を除く): 10641211

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 8887, 44435, 62209, 115531, 222175, 311045, 577655, 808717, 1555225, 2888275, 4043585, 20217925]

約数ペア:

[(1, 20217925), (5, 4043585), (7, 2888275), (13, 1555225), (25, 808717), (35, 577655), (65, 311045), (91, 222175), (175, 115531), (325, 62209), (455, 44435), (2275, 8887)]