4051640

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{509}}^1$

素因数の和:719

約数の個数: 32

約数和(自身を含む): 9180000

約数和(自身を除く): 5128360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 509, 796, 995, 1018, 1592, 1990, 2036, 2545, 3980, 4072, 5090, 7960, 10180, 20360, 101291, 202582, 405164, 506455, 810328, 1012910, 2025820, 4051640]

約数ペア:

[(1, 4051640), (2, 2025820), (4, 1012910), (5, 810328), (8, 506455), (10, 405164), (20, 202582), (40, 101291), (199, 20360), (398, 10180), (509, 7960), (796, 5090), (995, 4072), (1018, 3980), (1592, 2545), (1990, 2036)]