1640804080

素因数分解:

$2^4\times 5^1\times {\mathrm{2161}}^1\times {\mathrm{9491}}^1$

素因数の和:11665

約数の個数: 40

約数和(自身を含む): 3817036944

約数和(自身を除く): 2176232864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2161, 4322, 8644, 9491, 10805, 17288, 18982, 21610, 34576, 37964, 43220, 47455, 75928, 86440, 94910, 151856, 172880, 189820, 379640, 759280, 20510051, 41020102, 82040204, 102550255, 164080408, 205100510, 328160816, 410201020, 820402040, 1640804080]

約数ペア:

[(1, 1640804080), (2, 820402040), (4, 410201020), (5, 328160816), (8, 205100510), (10, 164080408), (16, 102550255), (20, 82040204), (40, 41020102), (80, 20510051), (2161, 759280), (4322, 379640), (8644, 189820), (9491, 172880), (10805, 151856), (17288, 94910), (18982, 86440), (21610, 75928), (34576, 47455), (37964, 43220)]