21617739

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{509}}^1$

素因数の和:553

約数の個数: 48

約数和(自身を含む): 37984800

約数和(自身を除く): 16367061

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 99, 117, 121, 143, 297, 351, 363, 429, 509, 1089, 1287, 1527, 1573, 3267, 3861, 4581, 4719, 5599, 6617, 13743, 14157, 16797, 19851, 42471, 50391, 59553, 61589, 72787, 151173, 178659, 184767, 218361, 554301, 655083, 800657, 1662903, 1965249, 2401971, 7205913, 21617739]

約数ペア:

[(1, 21617739), (3, 7205913), (9, 2401971), (11, 1965249), (13, 1662903), (27, 800657), (33, 655083), (39, 554301), (99, 218361), (117, 184767), (121, 178659), (143, 151173), (297, 72787), (351, 61589), (363, 59553), (429, 50391), (509, 42471), (1089, 19851), (1287, 16797), (1527, 14157), (1573, 13743), (3267, 6617), (3861, 5599), (4581, 4719)]