20698979

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{181}}^1$

素因数の和:267

約数の個数: 24

約数和(自身を含む): 26024544

約数和(自身を除く): 5325565

約数列:

[1, 7, 17, 31, 119, 181, 217, 527, 961, 1267, 3077, 3689, 5611, 6727, 16337, 21539, 39277, 95387, 114359, 173941, 667709, 1217587, 2956997, 20698979]

約数ペア:

[(1, 20698979), (7, 2956997), (17, 1217587), (31, 667709), (119, 173941), (181, 114359), (217, 95387), (527, 39277), (961, 21539), (1267, 16337), (3077, 6727), (3689, 5611)]