21640941

素因数分解:

$3^2\times 7^1\times {\mathrm{431}}^1\times {\mathrm{797}}^1$

素因数の和:1241

約数の個数: 24

約数和(自身を含む): 35852544

約数和(自身を除く): 14211603

約数列:

[1, 3, 7, 9, 21, 63, 431, 797, 1293, 2391, 3017, 3879, 5579, 7173, 9051, 16737, 27153, 50211, 343507, 1030521, 2404549, 3091563, 7213647, 21640941]

約数ペア:

[(1, 21640941), (3, 7213647), (7, 3091563), (9, 2404549), (21, 1030521), (63, 343507), (431, 50211), (797, 27153), (1293, 16737), (2391, 9051), (3017, 7173), (3879, 5579)]