21309189

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{1249}}^1$

素因数の和:1321

約数の個数: 24

約数和(自身を含む): 31920000

約数和(自身を除く): 10610811

約数列:

[1, 3, 11, 33, 47, 121, 141, 363, 517, 1249, 1551, 3747, 5687, 13739, 17061, 41217, 58703, 151129, 176109, 453387, 645733, 1937199, 7103063, 21309189]

約数ペア:

[(1, 21309189), (3, 7103063), (11, 1937199), (33, 645733), (47, 453387), (121, 176109), (141, 151129), (363, 58703), (517, 41217), (1249, 17061), (1551, 13739), (3747, 5687)]