21219495

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128603}}^1$

素因数の和:128622

約数の個数: 16

約数和(自身を含む): 37037952

約数和(自身を除く): 15818457

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128603, 385809, 643015, 1414633, 1929045, 4243899, 7073165, 21219495]

約数ペア:

[(1, 21219495), (3, 7073165), (5, 4243899), (11, 1929045), (15, 1414633), (33, 643015), (55, 385809), (165, 128603)]