39988220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{25309}}^1$

素因数の和:25397

約数の個数: 24

約数和(自身を含む): 85041600

約数和(自身を除く): 45053380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 25309, 50618, 101236, 126545, 253090, 506180, 1999411, 3998822, 7997644, 9997055, 19994110, 39988220]

約数ペア:

[(1, 39988220), (2, 19994110), (4, 9997055), (5, 7997644), (10, 3998822), (20, 1999411), (79, 506180), (158, 253090), (316, 126545), (395, 101236), (790, 50618), (1580, 25309)]