19716920

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2477}}^1$

素因数の和:2687

約数の個数: 32

約数和(自身を含む): 44604000

約数和(自身を除く): 24887080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 2477, 3980, 4954, 7960, 9908, 12385, 19816, 24770, 49540, 99080, 492923, 985846, 1971692, 2464615, 3943384, 4929230, 9858460, 19716920]

約数ペア:

[(1, 19716920), (2, 9858460), (4, 4929230), (5, 3943384), (8, 2464615), (10, 1971692), (20, 985846), (40, 492923), (199, 99080), (398, 49540), (796, 24770), (995, 19816), (1592, 12385), (1990, 9908), (2477, 7960), (3980, 4954)]