18871325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{421}}^1$

素因数の和:605

約数の個数: 24

約数和(自身を含む): 25745376

約数和(自身を除く): 6874051

約数列:

[1, 5, 11, 25, 55, 163, 275, 421, 815, 1793, 2105, 4075, 4631, 8965, 10525, 23155, 44825, 68623, 115775, 343115, 754853, 1715575, 3774265, 18871325]

約数ペア:

[(1, 18871325), (5, 3774265), (11, 1715575), (25, 754853), (55, 343115), (163, 115775), (275, 68623), (421, 44825), (815, 23155), (1793, 10525), (2105, 8965), (4075, 4631)]