20871501

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3463}}^1$

素因数の和:3521

約数の個数: 24

約数和(自身を含む): 33171264

約数和(自身を除く): 12299763

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3463, 6027, 10389, 24241, 72723, 141983, 169687, 425949, 509061, 993881, 2981643, 6957167, 20871501]

約数ペア:

[(1, 20871501), (3, 6957167), (7, 2981643), (21, 993881), (41, 509061), (49, 425949), (123, 169687), (147, 141983), (287, 72723), (861, 24241), (2009, 10389), (3463, 6027)]