19668500

素因数分解:

$2^2\times 5^3\times {\mathrm{139}}^1\times {\mathrm{283}}^1$

素因数の和:441

約数の個数: 48

約数和(自身を含む): 43417920

約数和(自身を除く): 23749420

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 139, 250, 278, 283, 500, 556, 566, 695, 1132, 1390, 1415, 2780, 2830, 3475, 5660, 6950, 7075, 13900, 14150, 17375, 28300, 34750, 35375, 39337, 69500, 70750, 78674, 141500, 157348, 196685, 393370, 786740, 983425, 1966850, 3933700, 4917125, 9834250, 19668500]

約数ペア:

[(1, 19668500), (2, 9834250), (4, 4917125), (5, 3933700), (10, 1966850), (20, 983425), (25, 786740), (50, 393370), (100, 196685), (125, 157348), (139, 141500), (250, 78674), (278, 70750), (283, 69500), (500, 39337), (556, 35375), (566, 34750), (695, 28300), (1132, 17375), (1390, 14150), (1415, 13900), (2780, 7075), (2830, 6950), (3475, 5660)]