19658140

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1487}}^1$

素因数の和:2157

約数の個数: 24

約数和(自身を含む): 41372352

約数和(自身を除く): 21714212

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1487, 2644, 2974, 3305, 5948, 6610, 7435, 13220, 14870, 29740, 982907, 1965814, 3931628, 4914535, 9829070, 19658140]

約数ペア:

[(1, 19658140), (2, 9829070), (4, 4914535), (5, 3931628), (10, 1965814), (20, 982907), (661, 29740), (1322, 14870), (1487, 13220), (2644, 7435), (2974, 6610), (3305, 5948)]