21687020

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5449}}^1$

素因数の和:5657

約数の個数: 24

約数和(自身を含む): 45780000

約数和(自身を除く): 24092980

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5449, 10898, 21796, 27245, 54490, 108980, 1084351, 2168702, 4337404, 5421755, 10843510, 21687020]

約数ペア:

[(1, 21687020), (2, 10843510), (4, 5421755), (5, 4337404), (10, 2168702), (20, 1084351), (199, 108980), (398, 54490), (796, 27245), (995, 21796), (1990, 10898), (3980, 5449)]