21085239

素因数分解:

$3^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:716

約数の個数: 32

約数和(自身を含む): 33894400

約数和(自身を除く): 12809161

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 343, 651, 661, 1029, 1519, 1983, 4557, 4627, 10633, 13881, 20491, 31899, 32389, 61473, 97167, 143437, 226723, 430311, 680169, 1004059, 3012177, 7028413, 21085239]

約数ペア:

[(1, 21085239), (3, 7028413), (7, 3012177), (21, 1004059), (31, 680169), (49, 430311), (93, 226723), (147, 143437), (217, 97167), (343, 61473), (651, 32389), (661, 31899), (1029, 20491), (1519, 13881), (1983, 10633), (4557, 4627)]