21708519

素因数分解:

$3^1\times 7^2\times {\mathrm{59}}^1\times {\mathrm{2503}}^1$

素因数の和:2579

約数の個数: 24

約数和(自身を含む): 34254720

約数和(自身を除く): 12546201

約数列:

[1, 3, 7, 21, 49, 59, 147, 177, 413, 1239, 2503, 2891, 7509, 8673, 17521, 52563, 122647, 147677, 367941, 443031, 1033739, 3101217, 7236173, 21708519]

約数ペア:

[(1, 21708519), (3, 7236173), (7, 3101217), (21, 1033739), (49, 443031), (59, 367941), (147, 147677), (177, 122647), (413, 52563), (1239, 17521), (2503, 8673), (2891, 7509)]