20989388

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{25849}}^1$

素因数の和:25889

約数の個数: 24

約数和(自身を含む): 43428000

約数和(自身を除く): 22438612

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812, 25849, 51698, 103396, 180943, 361886, 723772, 749621, 1499242, 2998484, 5247347, 10494694, 20989388]

約数ペア:

[(1, 20989388), (2, 10494694), (4, 5247347), (7, 2998484), (14, 1499242), (28, 749621), (29, 723772), (58, 361886), (116, 180943), (203, 103396), (406, 51698), (812, 25849)]