21219795

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 38338560

約数和(自身を除く): 17118765

約数列:

[1, 3, 5, 9, 15, 45, 47, 79, 127, 141, 235, 237, 381, 395, 423, 635, 705, 711, 1143, 1185, 1905, 2115, 3555, 3713, 5715, 5969, 10033, 11139, 17907, 18565, 29845, 30099, 33417, 50165, 53721, 55695, 89535, 90297, 150495, 167085, 268605, 451485, 471551, 1414653, 2357755, 4243959, 7073265, 21219795]

約数ペア:

[(1, 21219795), (3, 7073265), (5, 4243959), (9, 2357755), (15, 1414653), (45, 471551), (47, 451485), (79, 268605), (127, 167085), (141, 150495), (235, 90297), (237, 89535), (381, 55695), (395, 53721), (423, 50165), (635, 33417), (705, 30099), (711, 29845), (1143, 18565), (1185, 17907), (1905, 11139), (2115, 10033), (3555, 5969), (3713, 5715)]