28098025

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{3889}}^1$

素因数の和:3933

約数の個数: 18

約数和(自身を含む): 37021130

約数和(自身を除く): 8923105

約数列:

[1, 5, 17, 25, 85, 289, 425, 1445, 3889, 7225, 19445, 66113, 97225, 330565, 1123921, 1652825, 5619605, 28098025]

約数ペア:

[(1, 28098025), (5, 5619605), (17, 1652825), (25, 1123921), (85, 330565), (289, 97225), (425, 66113), (1445, 19445), (3889, 7225)]