21352905

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1279}}^1$

素因数の和:1350

約数の個数: 48

約数和(自身を含む): 43130880

約数和(自身を除く): 21777975

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 53, 63, 105, 159, 265, 315, 371, 477, 795, 1113, 1279, 1855, 2385, 3339, 3837, 5565, 6395, 8953, 11511, 16695, 19185, 26859, 44765, 57555, 67787, 80577, 134295, 203361, 338935, 402885, 474509, 610083, 1016805, 1423527, 2372545, 3050415, 4270581, 7117635, 21352905]

約数ペア:

[(1, 21352905), (3, 7117635), (5, 4270581), (7, 3050415), (9, 2372545), (15, 1423527), (21, 1016805), (35, 610083), (45, 474509), (53, 402885), (63, 338935), (105, 203361), (159, 134295), (265, 80577), (315, 67787), (371, 57555), (477, 44765), (795, 26859), (1113, 19185), (1279, 16695), (1855, 11511), (2385, 8953), (3339, 6395), (3837, 5565)]