19880225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1613}}^1$

素因数の和:1669

約数の個数: 24

約数和(自身を含む): 27018360

約数和(自身を除く): 7138135

約数列:

[1, 5, 17, 25, 29, 85, 145, 425, 493, 725, 1613, 2465, 8065, 12325, 27421, 40325, 46777, 137105, 233885, 685525, 795209, 1169425, 3976045, 19880225]

約数ペア:

[(1, 19880225), (5, 3976045), (17, 1169425), (25, 795209), (29, 685525), (85, 233885), (145, 137105), (425, 46777), (493, 40325), (725, 27421), (1613, 12325), (2465, 8065)]