15915280

素因数分解:

$2^4\times 5^1\times {\mathrm{198941}}^1$

素因数の和:198954

約数の個数: 20

約数和(自身を含む): 37003212

約数和(自身を除く): 21087932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 198941, 397882, 795764, 994705, 1591528, 1989410, 3183056, 3978820, 7957640, 15915280]

約数ペア:

[(1, 15915280), (2, 7957640), (4, 3978820), (5, 3183056), (8, 1989410), (10, 1591528), (16, 994705), (20, 795764), (40, 397882), (80, 198941)]