20658813

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{9551}}^1$

素因数の和:9664

約数の個数: 16

約数和(自身を含む): 31789056

約数和(自身を除く): 11130243

約数列:

[1, 3, 7, 21, 103, 309, 721, 2163, 9551, 28653, 66857, 200571, 983753, 2951259, 6886271, 20658813]

約数ペア:

[(1, 20658813), (3, 6886271), (7, 2951259), (21, 983753), (103, 200571), (309, 66857), (721, 28653), (2163, 9551)]