21382281

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{443}}^1$

素因数の和:653

約数の個数: 24

約数和(自身を含む): 32138496

約数和(自身を除く): 10756215

約数列:

[1, 3, 9, 31, 93, 173, 279, 443, 519, 1329, 1557, 3987, 5363, 13733, 16089, 41199, 48267, 76639, 123597, 229917, 689751, 2375809, 7127427, 21382281]

約数ペア:

[(1, 21382281), (3, 7127427), (9, 2375809), (31, 689751), (93, 229917), (173, 123597), (279, 76639), (443, 48267), (519, 41199), (1329, 16089), (1557, 13733), (3987, 5363)]