21138020

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{3929}}^1$

素因数の和:4207

約数の個数: 24

約数和(自身を含む): 44566200

約数和(自身を除く): 23428180

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 3929, 5380, 7858, 15716, 19645, 39290, 78580, 1056901, 2113802, 4227604, 5284505, 10569010, 21138020]

約数ペア:

[(1, 21138020), (2, 10569010), (4, 5284505), (5, 4227604), (10, 2113802), (20, 1056901), (269, 78580), (538, 39290), (1076, 19645), (1345, 15716), (2690, 7858), (3929, 5380)]