19909360

素因数分解:

$2^4\times 5^1\times {\mathrm{248867}}^1$

素因数の和:248880

約数の個数: 20

約数和(自身を含む): 46289448

約数和(自身を除く): 26380088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248867, 497734, 995468, 1244335, 1990936, 2488670, 3981872, 4977340, 9954680, 19909360]

約数ペア:

[(1, 19909360), (2, 9954680), (4, 4977340), (5, 3981872), (8, 2488670), (10, 1990936), (16, 1244335), (20, 995468), (40, 497734), (80, 248867)]