20718909

素因数分解:

$3^6\times {\mathrm{97}}^1\times {\mathrm{293}}^1$

素因数の和:408

約数の個数: 28

約数和(自身を含む): 31491516

約数和(自身を除く): 10772607

約数列:

[1, 3, 9, 27, 81, 97, 243, 291, 293, 729, 873, 879, 2619, 2637, 7857, 7911, 23571, 23733, 28421, 70713, 71199, 85263, 213597, 255789, 767367, 2302101, 6906303, 20718909]

約数ペア:

[(1, 20718909), (3, 6906303), (9, 2302101), (27, 767367), (81, 255789), (97, 213597), (243, 85263), (291, 71199), (293, 70713), (729, 28421), (873, 23733), (879, 23571), (2619, 7911), (2637, 7857)]