81757100

素因数分解:

$2^2\times 5^2\times {\mathrm{79}}^2\times {\mathrm{131}}^1$

素因数の和:303

約数の個数: 54

約数和(自身を含む): 181058724

約数和(自身を除く): 99301624

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 131, 158, 262, 316, 395, 524, 655, 790, 1310, 1580, 1975, 2620, 3275, 3950, 6241, 6550, 7900, 10349, 12482, 13100, 20698, 24964, 31205, 41396, 51745, 62410, 103490, 124820, 156025, 206980, 258725, 312050, 517450, 624100, 817571, 1034900, 1635142, 3270284, 4087855, 8175710, 16351420, 20439275, 40878550, 81757100]

約数ペア:

[(1, 81757100), (2, 40878550), (4, 20439275), (5, 16351420), (10, 8175710), (20, 4087855), (25, 3270284), (50, 1635142), (79, 1034900), (100, 817571), (131, 624100), (158, 517450), (262, 312050), (316, 258725), (395, 206980), (524, 156025), (655, 124820), (790, 103490), (1310, 62410), (1580, 51745), (1975, 41396), (2620, 31205), (3275, 24964), (3950, 20698), (6241, 13100), (6550, 12482), (7900, 10349)]