81321640

素因数分解:

$2^3\times 5^1\times {\mathrm{2033041}}^1$

素因数の和:2033052

約数の個数: 16

約数和(自身を含む): 182973780

約数和(自身を除く): 101652140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2033041, 4066082, 8132164, 10165205, 16264328, 20330410, 40660820, 81321640]

約数ペア:

[(1, 81321640), (2, 40660820), (4, 20330410), (5, 16264328), (8, 10165205), (10, 8132164), (20, 4066082), (40, 2033041)]