21715281

素因数分解:

$3^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{1201}}^1$

素因数の和:1262

約数の個数: 36

約数和(自身を含む): 37408644

約数和(自身を除く): 15693363

約数列:

[1, 3, 7, 9, 21, 41, 49, 63, 123, 147, 287, 369, 441, 861, 1201, 2009, 2583, 3603, 6027, 8407, 10809, 18081, 25221, 49241, 58849, 75663, 147723, 176547, 344687, 443169, 529641, 1034061, 2412809, 3102183, 7238427, 21715281]

約数ペア:

[(1, 21715281), (3, 7238427), (7, 3102183), (9, 2412809), (21, 1034061), (41, 529641), (49, 443169), (63, 344687), (123, 176547), (147, 147723), (287, 75663), (369, 58849), (441, 49241), (861, 25221), (1201, 18081), (2009, 10809), (2583, 8407), (3603, 6027)]