28277980

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{13999}}^1$

素因数の和:14109

約数の個数: 24

約数和(自身を含む): 59976000

約数和(自身を除く): 31698020

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 13999, 27998, 55996, 69995, 139990, 279980, 1413899, 2827798, 5655596, 7069495, 14138990, 28277980]

約数ペア:

[(1, 28277980), (2, 14138990), (4, 7069495), (5, 5655596), (10, 2827798), (20, 1413899), (101, 279980), (202, 139990), (404, 69995), (505, 55996), (1010, 27998), (2020, 13999)]