389968360

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{48991}}^1$

素因数の和:49201

約数の個数: 32

約数和(自身を含む): 881856000

約数和(自身を除く): 491887640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 48991, 97982, 195964, 244955, 391928, 489910, 979820, 1959640, 9749209, 19498418, 38996836, 48746045, 77993672, 97492090, 194984180, 389968360]

約数ペア:

[(1, 389968360), (2, 194984180), (4, 97492090), (5, 77993672), (8, 48746045), (10, 38996836), (20, 19498418), (40, 9749209), (199, 1959640), (398, 979820), (796, 489910), (995, 391928), (1592, 244955), (1990, 195964), (3980, 97982), (7960, 48991)]