28009900

素因数分解:

$2^2\times 5^2\times {\mathrm{280099}}^1$

素因数の和:280113

約数の個数: 18

約数和(自身を含む): 60781700

約数和(自身を除く): 32771800

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 280099, 560198, 1120396, 1400495, 2800990, 5601980, 7002475, 14004950, 28009900]

約数ペア:

[(1, 28009900), (2, 14004950), (4, 7002475), (5, 5601980), (10, 2800990), (20, 1400495), (25, 1120396), (50, 560198), (100, 280099)]