81345760

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3881}}^1$

素因数の和:4027

約数の個数: 48

約数和(自身を含む): 193696272

約数和(自身を除く): 112350512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 1048, 1310, 2096, 2620, 3881, 4192, 5240, 7762, 10480, 15524, 19405, 20960, 31048, 38810, 62096, 77620, 124192, 155240, 310480, 508411, 620960, 1016822, 2033644, 2542055, 4067288, 5084110, 8134576, 10168220, 16269152, 20336440, 40672880, 81345760]

約数ペア:

[(1, 81345760), (2, 40672880), (4, 20336440), (5, 16269152), (8, 10168220), (10, 8134576), (16, 5084110), (20, 4067288), (32, 2542055), (40, 2033644), (80, 1016822), (131, 620960), (160, 508411), (262, 310480), (524, 155240), (655, 124192), (1048, 77620), (1310, 62096), (2096, 38810), (2620, 31048), (3881, 20960), (4192, 19405), (5240, 15524), (7762, 10480)]