21009639

素因数分解:

$3^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{5783}}^1$

素因数の和:5966

約数の個数: 16

約数和(自身を含む): 32205312

約数和(自身を除く): 11195673

約数列:

[1, 3, 7, 21, 173, 519, 1211, 3633, 5783, 17349, 40481, 121443, 1000459, 3001377, 7003213, 21009639]

約数ペア:

[(1, 21009639), (3, 7003213), (7, 3001377), (21, 1000459), (173, 121443), (519, 40481), (1211, 17349), (3633, 5783)]