21959661

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1\times {\mathrm{787}}^1$

素因数の和:992

約数の個数: 16

約数和(自身を含む): 29956608

約数和(自身を除く): 7996947

約数列:

[1, 3, 71, 131, 213, 393, 787, 2361, 9301, 27903, 55877, 103097, 167631, 309291, 7319887, 21959661]

約数ペア:

[(1, 21959661), (3, 7319887), (71, 309291), (131, 167631), (213, 103097), (393, 55877), (787, 27903), (2361, 9301)]