28131560

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1087}}^1$

素因数の和:1745

約数の個数: 32

約数和(自身を含む): 63452160

約数和(自身を除く): 35320600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1087, 1294, 2174, 2588, 3235, 4348, 5176, 5435, 6470, 8696, 10870, 12940, 21740, 25880, 43480, 703289, 1406578, 2813156, 3516445, 5626312, 7032890, 14065780, 28131560]

約数ペア:

[(1, 28131560), (2, 14065780), (4, 7032890), (5, 5626312), (8, 3516445), (10, 2813156), (20, 1406578), (40, 703289), (647, 43480), (1087, 25880), (1294, 21740), (2174, 12940), (2588, 10870), (3235, 8696), (4348, 6470), (5176, 5435)]