19900660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76541}}^1$

素因数の和:76563

約数の個数: 24

約数和(自身を含む): 45006696

約数和(自身を除く): 25106036

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76541, 153082, 306164, 382705, 765410, 995033, 1530820, 1990066, 3980132, 4975165, 9950330, 19900660]

約数ペア:

[(1, 19900660), (2, 9950330), (4, 4975165), (5, 3980132), (10, 1990066), (13, 1530820), (20, 995033), (26, 765410), (52, 382705), (65, 306164), (130, 153082), (260, 76541)]