65405680

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^2\times {\mathrm{131}}^1$

素因数の和:302

約数の個数: 60

約数和(自身を含む): 155193192

約数和(自身を除く): 89787512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 131, 158, 262, 316, 395, 524, 632, 655, 790, 1048, 1264, 1310, 1580, 2096, 2620, 3160, 5240, 6241, 6320, 10349, 10480, 12482, 20698, 24964, 31205, 41396, 49928, 51745, 62410, 82792, 99856, 103490, 124820, 165584, 206980, 249640, 413960, 499280, 817571, 827920, 1635142, 3270284, 4087855, 6540568, 8175710, 13081136, 16351420, 32702840, 65405680]

約数ペア:

[(1, 65405680), (2, 32702840), (4, 16351420), (5, 13081136), (8, 8175710), (10, 6540568), (16, 4087855), (20, 3270284), (40, 1635142), (79, 827920), (80, 817571), (131, 499280), (158, 413960), (262, 249640), (316, 206980), (395, 165584), (524, 124820), (632, 103490), (655, 99856), (790, 82792), (1048, 62410), (1264, 51745), (1310, 49928), (1580, 41396), (2096, 31205), (2620, 24964), (3160, 20698), (5240, 12482), (6241, 10480), (6320, 10349)]