21140109

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8419}}^1$

素因数の和:8462

約数の個数: 20

約数和(自身を含む): 32602240

約数和(自身を除く): 11462131

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8419, 25257, 75771, 227313, 260989, 681939, 782967, 2348901, 7046703, 21140109]

約数ペア:

[(1, 21140109), (3, 7046703), (9, 2348901), (27, 782967), (31, 681939), (81, 260989), (93, 227313), (279, 75771), (837, 25257), (2511, 8419)]