81990640

素因数分解:

$2^4\times 5^1\times {\mathrm{1024883}}^1$

素因数の和:1024896

約数の個数: 20

約数和(自身を含む): 190628424

約数和(自身を除く): 108637784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1024883, 2049766, 4099532, 5124415, 8199064, 10248830, 16398128, 20497660, 40995320, 81990640]

約数ペア:

[(1, 81990640), (2, 40995320), (4, 20497660), (5, 16398128), (8, 10248830), (10, 8199064), (16, 5124415), (20, 4099532), (40, 2049766), (80, 1024883)]