21390951

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{3463}}^1$

素因数の和:3566

約数の個数: 16

約数和(自身を含む): 29928960

約数和(自身を除く): 8538009

約数列:

[1, 3, 29, 71, 87, 213, 2059, 3463, 6177, 10389, 100427, 245873, 301281, 737619, 7130317, 21390951]

約数ペア:

[(1, 21390951), (3, 7130317), (29, 737619), (71, 301281), (87, 245873), (213, 100427), (2059, 10389), (3463, 6177)]