320642020

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{337}}^1\times {\mathrm{421}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 682941168

約数和(自身を除く): 362299148

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 337, 421, 452, 565, 674, 842, 1130, 1348, 1684, 1685, 2105, 2260, 3370, 4210, 6740, 8420, 38081, 47573, 76162, 95146, 141877, 152324, 190292, 190405, 237865, 283754, 380810, 475730, 567508, 709385, 761620, 951460, 1418770, 2837540, 16032101, 32064202, 64128404, 80160505, 160321010, 320642020]

約数ペア:

[(1, 320642020), (2, 160321010), (4, 80160505), (5, 64128404), (10, 32064202), (20, 16032101), (113, 2837540), (226, 1418770), (337, 951460), (421, 761620), (452, 709385), (565, 567508), (674, 475730), (842, 380810), (1130, 283754), (1348, 237865), (1684, 190405), (1685, 190292), (2105, 152324), (2260, 141877), (3370, 95146), (4210, 76162), (6740, 47573), (8420, 38081)]