21902979

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{25439}}^1$

素因数の和:25490

約数の個数: 16

約数和(自身を含む): 34191360

約数和(自身を除く): 12288381

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 25439, 76317, 178073, 534219, 1042999, 3128997, 7300993, 21902979]

約数ペア:

[(1, 21902979), (3, 7300993), (7, 3128997), (21, 1042999), (41, 534219), (123, 178073), (287, 76317), (861, 25439)]