21807579

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{2381}}^1$

素因数の和:2498

約数の個数: 16

約数和(自身を含む): 30184704

約数和(自身を除く): 8377125

約数列:

[1, 3, 43, 71, 129, 213, 2381, 3053, 7143, 9159, 102383, 169051, 307149, 507153, 7269193, 21807579]

約数ペア:

[(1, 21807579), (3, 7269193), (43, 507153), (71, 307149), (129, 169051), (213, 102383), (2381, 9159), (3053, 7143)]