51781640

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{3911}}^1$

素因数の和:4253

約数の個数: 32

約数和(自身を含む): 116890560

約数和(自身を除く): 65108920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1655, 2648, 3310, 3911, 6620, 7822, 13240, 15644, 19555, 31288, 39110, 78220, 156440, 1294541, 2589082, 5178164, 6472705, 10356328, 12945410, 25890820, 51781640]

約数ペア:

[(1, 51781640), (2, 25890820), (4, 12945410), (5, 10356328), (8, 6472705), (10, 5178164), (20, 2589082), (40, 1294541), (331, 156440), (662, 78220), (1324, 39110), (1655, 31288), (2648, 19555), (3310, 15644), (3911, 13240), (6620, 7822)]