28104680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{17137}}^1$

素因数の和:17189

約数の個数: 32

約数和(自身を含む): 64781640

約数和(自身を除く): 36676960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 17137, 34274, 68548, 85685, 137096, 171370, 342740, 685480, 702617, 1405234, 2810468, 3513085, 5620936, 7026170, 14052340, 28104680]

約数ペア:

[(1, 28104680), (2, 14052340), (4, 7026170), (5, 5620936), (8, 3513085), (10, 2810468), (20, 1405234), (40, 702617), (41, 685480), (82, 342740), (164, 171370), (205, 137096), (328, 85685), (410, 68548), (820, 34274), (1640, 17137)]