21712761

素因数分解:

$3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{3221}}^1$

素因数の和:3341

約数の個数: 24

約数和(自身を含む): 36189504

約数和(自身を除く): 14476743

約数列:

[1, 3, 7, 9, 21, 63, 107, 321, 749, 963, 2247, 3221, 6741, 9663, 22547, 28989, 67641, 202923, 344647, 1033941, 2412529, 3101823, 7237587, 21712761]

約数ペア:

[(1, 21712761), (3, 7237587), (7, 3101823), (9, 2412529), (21, 1033941), (63, 344647), (107, 202923), (321, 67641), (749, 28989), (963, 22547), (2247, 9663), (3221, 6741)]