21508209

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{1723}}^1$

素因数の和:1821

約数の個数: 24

約数和(自身を含む): 33169760

約数和(自身を除く): 11661551

約数列:

[1, 3, 9, 19, 57, 73, 171, 219, 657, 1387, 1723, 4161, 5169, 12483, 15507, 32737, 98211, 125779, 294633, 377337, 1132011, 2389801, 7169403, 21508209]

約数ペア:

[(1, 21508209), (3, 7169403), (9, 2389801), (19, 1132011), (57, 377337), (73, 294633), (171, 125779), (219, 98211), (657, 32737), (1387, 15507), (1723, 12483), (4161, 5169)]