21095217

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{443}}^1$

素因数の和:510

約数の個数: 48

約数和(自身を含む): 36848448

約数和(自身を除く): 15753231

約数列:

[1, 3, 9, 11, 13, 33, 37, 39, 99, 111, 117, 143, 333, 407, 429, 443, 481, 1221, 1287, 1329, 1443, 3663, 3987, 4329, 4873, 5291, 5759, 14619, 15873, 16391, 17277, 43857, 47619, 49173, 51831, 63349, 147519, 180301, 190047, 213083, 540903, 570141, 639249, 1622709, 1917747, 2343913, 7031739, 21095217]

約数ペア:

[(1, 21095217), (3, 7031739), (9, 2343913), (11, 1917747), (13, 1622709), (33, 639249), (37, 570141), (39, 540903), (99, 213083), (111, 190047), (117, 180301), (143, 147519), (333, 63349), (407, 51831), (429, 49173), (443, 47619), (481, 43857), (1221, 17277), (1287, 16391), (1329, 15873), (1443, 14619), (3663, 5759), (3987, 5291), (4329, 4873)]