20218525

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{421}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 26844264

約数和(自身を除く): 6625739

約数列:

[1, 5, 17, 25, 85, 113, 421, 425, 565, 1921, 2105, 2825, 7157, 9605, 10525, 35785, 47573, 48025, 178925, 237865, 808741, 1189325, 4043705, 20218525]

約数ペア:

[(1, 20218525), (5, 4043705), (17, 1189325), (25, 808741), (85, 237865), (113, 178925), (421, 48025), (425, 47573), (565, 35785), (1921, 10525), (2105, 9605), (2825, 7157)]