21523281

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{8237}}^1$

素因数の和:8320

約数の個数: 16

約数和(自身を含む): 31370304

約数和(自身を除く): 9847023

約数列:

[1, 3, 13, 39, 67, 201, 871, 2613, 8237, 24711, 107081, 321243, 551879, 1655637, 7174427, 21523281]

約数ペア:

[(1, 21523281), (3, 7174427), (13, 1655637), (39, 551879), (67, 321243), (201, 107081), (871, 24711), (2613, 8237)]