20552720

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1291}}^1$

素因数の和:1503

約数の個数: 40

約数和(自身を含む): 48062400

約数和(自身を除く): 27509680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1291, 1592, 1990, 2582, 3184, 3980, 5164, 6455, 7960, 10328, 12910, 15920, 20656, 25820, 51640, 103280, 256909, 513818, 1027636, 1284545, 2055272, 2569090, 4110544, 5138180, 10276360, 20552720]

約数ペア:

[(1, 20552720), (2, 10276360), (4, 5138180), (5, 4110544), (8, 2569090), (10, 2055272), (16, 1284545), (20, 1027636), (40, 513818), (80, 256909), (199, 103280), (398, 51640), (796, 25820), (995, 20656), (1291, 15920), (1592, 12910), (1990, 10328), (2582, 7960), (3184, 6455), (3980, 5164)]