21191027

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{379}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 6387853

約数列:

[1, 11, 13, 17, 23, 143, 187, 221, 253, 299, 379, 391, 2431, 3289, 4169, 4301, 4927, 5083, 6443, 8717, 54197, 55913, 70873, 83759, 95887, 113321, 148189, 921349, 1246531, 1630079, 1926457, 21191027]

約数ペア:

[(1, 21191027), (11, 1926457), (13, 1630079), (17, 1246531), (23, 921349), (143, 148189), (187, 113321), (221, 95887), (253, 83759), (299, 70873), (379, 55913), (391, 54197), (2431, 8717), (3289, 6443), (4169, 5083), (4301, 4927)]