21360885

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15649}}^1$

素因数の和:15677

約数の個数: 32

約数和(自身を含む): 42067200

約数和(自身を除く): 20706315

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15649, 46947, 78245, 109543, 203437, 234735, 328629, 547715, 610311, 1017185, 1424059, 1643145, 3051555, 4272177, 7120295, 21360885]

約数ペア:

[(1, 21360885), (3, 7120295), (5, 4272177), (7, 3051555), (13, 1643145), (15, 1424059), (21, 1017185), (35, 610311), (39, 547715), (65, 328629), (91, 234735), (105, 203437), (195, 109543), (273, 78245), (455, 46947), (1365, 15649)]