201991640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{117437}}^1$

素因数の和:117491

約数の個数: 32

約数和(自身を含む): 465054480

約数和(自身を除く): 263062840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 117437, 234874, 469748, 587185, 939496, 1174370, 2348740, 4697480, 5049791, 10099582, 20199164, 25248955, 40398328, 50497910, 100995820, 201991640]

約数ペア:

[(1, 201991640), (2, 100995820), (4, 50497910), (5, 40398328), (8, 25248955), (10, 20199164), (20, 10099582), (40, 5049791), (43, 4697480), (86, 2348740), (172, 1174370), (215, 939496), (344, 587185), (430, 469748), (860, 234874), (1720, 117437)]