81907160

素因数分解:

$2^3\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{1601}}^1$

素因数の和:2891

約数の個数: 32

約数和(自身を含む): 184550400

約数和(自身を除く): 102643240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1279, 1601, 2558, 3202, 5116, 6395, 6404, 8005, 10232, 12790, 12808, 16010, 25580, 32020, 51160, 64040, 2047679, 4095358, 8190716, 10238395, 16381432, 20476790, 40953580, 81907160]

約数ペア:

[(1, 81907160), (2, 40953580), (4, 20476790), (5, 16381432), (8, 10238395), (10, 8190716), (20, 4095358), (40, 2047679), (1279, 64040), (1601, 51160), (2558, 32020), (3202, 25580), (5116, 16010), (6395, 12808), (6404, 12790), (8005, 10232)]