21520455

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 38610432

約数和(自身を除く): 17089977

約数列:

[1, 3, 5, 11, 15, 33, 55, 71, 121, 165, 167, 213, 355, 363, 501, 605, 781, 835, 1065, 1815, 1837, 2343, 2505, 3905, 5511, 8591, 9185, 11715, 11857, 20207, 25773, 27555, 35571, 42955, 59285, 60621, 101035, 128865, 130427, 177855, 303105, 391281, 652135, 1434697, 1956405, 4304091, 7173485, 21520455]

約数ペア:

[(1, 21520455), (3, 7173485), (5, 4304091), (11, 1956405), (15, 1434697), (33, 652135), (55, 391281), (71, 303105), (121, 177855), (165, 130427), (167, 128865), (213, 101035), (355, 60621), (363, 59285), (501, 42955), (605, 35571), (781, 27555), (835, 25773), (1065, 20207), (1815, 11857), (1837, 11715), (2343, 9185), (2505, 8591), (3905, 5511)]