21021057

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{587}}^1$

素因数の和:789

約数の個数: 24

約数和(自身を含む): 31921344

約数和(自身を除く): 10900287

約数列:

[1, 3, 9, 23, 69, 173, 207, 519, 587, 1557, 1761, 3979, 5283, 11937, 13501, 35811, 40503, 101551, 121509, 304653, 913959, 2335673, 7007019, 21021057]

約数ペア:

[(1, 21021057), (3, 7007019), (9, 2335673), (23, 913959), (69, 304653), (173, 121509), (207, 101551), (519, 40503), (587, 35811), (1557, 13501), (1761, 11937), (3979, 5283)]