21519855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1289}}^1$

素因数の和:1360

約数の個数: 48

約数和(自身を含む): 43467840

約数和(自身を除く): 21947985

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 53, 63, 105, 159, 265, 315, 371, 477, 795, 1113, 1289, 1855, 2385, 3339, 3867, 5565, 6445, 9023, 11601, 16695, 19335, 27069, 45115, 58005, 68317, 81207, 135345, 204951, 341585, 406035, 478219, 614853, 1024755, 1434657, 2391095, 3074265, 4303971, 7173285, 21519855]

約数ペア:

[(1, 21519855), (3, 7173285), (5, 4303971), (7, 3074265), (9, 2391095), (15, 1434657), (21, 1024755), (35, 614853), (45, 478219), (53, 406035), (63, 341585), (105, 204951), (159, 135345), (265, 81207), (315, 68317), (371, 58005), (477, 45115), (795, 27069), (1113, 19335), (1289, 16695), (1855, 11601), (2385, 9023), (3339, 6445), (3867, 5565)]