81678560

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12451}}^1$

素因数の和:12507

約数の個数: 48

約数和(自身を含む): 197687952

約数和(自身を除く): 116009392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3280, 6560, 12451, 24902, 49804, 62255, 99608, 124510, 199216, 249020, 398432, 498040, 510491, 996080, 1020982, 1992160, 2041964, 2552455, 4083928, 5104910, 8167856, 10209820, 16335712, 20419640, 40839280, 81678560]

約数ペア:

[(1, 81678560), (2, 40839280), (4, 20419640), (5, 16335712), (8, 10209820), (10, 8167856), (16, 5104910), (20, 4083928), (32, 2552455), (40, 2041964), (41, 1992160), (80, 1020982), (82, 996080), (160, 510491), (164, 498040), (205, 398432), (328, 249020), (410, 199216), (656, 124510), (820, 99608), (1312, 62255), (1640, 49804), (3280, 24902), (6560, 12451)]