20198507960

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2537501}}^1$

素因数の和:2537711

約数の個数: 32

約数和(自身を含む): 45675036000

約数和(自身を除く): 25476528040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 2537501, 5075002, 10150004, 12687505, 20300008, 25375010, 50750020, 101500040, 504962699, 1009925398, 2019850796, 2524813495, 4039701592, 5049626990, 10099253980, 20198507960]

約数ペア:

[(1, 20198507960), (2, 10099253980), (4, 5049626990), (5, 4039701592), (8, 2524813495), (10, 2019850796), (20, 1009925398), (40, 504962699), (199, 101500040), (398, 50750020), (796, 25375010), (995, 20300008), (1592, 12687505), (1990, 10150004), (3980, 5075002), (7960, 2537501)]