20198620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77687}}^1$

素因数の和:77709

約数の個数: 24

約数和(自身を含む): 45680544

約数和(自身を除く): 25481924

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 77687, 155374, 310748, 388435, 776870, 1009931, 1553740, 2019862, 4039724, 5049655, 10099310, 20198620]

約数ペア:

[(1, 20198620), (2, 10099310), (4, 5049655), (5, 4039724), (10, 2019862), (13, 1553740), (20, 1009931), (26, 776870), (52, 388435), (65, 310748), (130, 155374), (260, 77687)]