21787101

素因数分解:

$3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1999}}^1$

素因数の和:2185

約数の個数: 24

約数和(自身を含む): 36192000

約数和(自身を除く): 14404899

約数列:

[1, 3, 7, 9, 21, 63, 173, 519, 1211, 1557, 1999, 3633, 5997, 10899, 13993, 17991, 41979, 125937, 345827, 1037481, 2420789, 3112443, 7262367, 21787101]

約数ペア:

[(1, 21787101), (3, 7262367), (7, 3112443), (9, 2420789), (21, 1037481), (63, 345827), (173, 125937), (519, 41979), (1211, 17991), (1557, 13993), (1999, 10899), (3633, 5997)]