21671217

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{433}}^1$

素因数の和:589

約数の個数: 24

約数和(自身を含む): 32227104

約数和(自身を除く): 10555887

約数列:

[1, 3, 9, 67, 83, 201, 249, 433, 603, 747, 1299, 3897, 5561, 16683, 29011, 35939, 50049, 87033, 107817, 261099, 323451, 2407913, 7223739, 21671217]

約数ペア:

[(1, 21671217), (3, 7223739), (9, 2407913), (67, 323451), (83, 261099), (201, 107817), (249, 87033), (433, 50049), (603, 35939), (747, 29011), (1299, 16683), (3897, 5561)]