20871207

素因数分解:

$3^2\times 7^3\times {\mathrm{6761}}^1$

素因数の和:6788

約数の個数: 24

約数和(自身を含む): 35162400

約数和(自身を除く): 14291193

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6761, 20283, 47327, 60849, 141981, 331289, 425943, 993867, 2319023, 2981601, 6957069, 20871207]

約数ペア:

[(1, 20871207), (3, 6957069), (7, 2981601), (9, 2319023), (21, 993867), (49, 425943), (63, 331289), (147, 141981), (343, 60849), (441, 47327), (1029, 20283), (3087, 6761)]