8640580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{199}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 19756800

約数和(自身を除く): 11116220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 167, 199, 260, 334, 398, 668, 796, 835, 995, 1670, 1990, 2171, 2587, 3340, 3980, 4342, 5174, 8684, 10348, 10855, 12935, 21710, 25870, 33233, 43420, 51740, 66466, 132932, 166165, 332330, 432029, 664660, 864058, 1728116, 2160145, 4320290, 8640580]

約数ペア:

[(1, 8640580), (2, 4320290), (4, 2160145), (5, 1728116), (10, 864058), (13, 664660), (20, 432029), (26, 332330), (52, 166165), (65, 132932), (130, 66466), (167, 51740), (199, 43420), (260, 33233), (334, 25870), (398, 21710), (668, 12935), (796, 10855), (835, 10348), (995, 8684), (1670, 5174), (1990, 4342), (2171, 3980), (2587, 3340)]