90178840

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{11329}}^1$

素因数の和:11539

約数の個数: 32

約数和(自身を含む): 203940000

約数和(自身を除く): 113761160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 11329, 22658, 45316, 56645, 90632, 113290, 226580, 453160, 2254471, 4508942, 9017884, 11272355, 18035768, 22544710, 45089420, 90178840]

約数ペア:

[(1, 90178840), (2, 45089420), (4, 22544710), (5, 18035768), (8, 11272355), (10, 9017884), (20, 4508942), (40, 2254471), (199, 453160), (398, 226580), (796, 113290), (995, 90632), (1592, 56645), (1990, 45316), (3980, 22658), (7960, 11329)]