21005569

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{1109}}^1$

素因数の和:1200

約数の個数: 16

約数和(自身を含む): 23869440

約数和(自身を除く): 2863871

約数列:

[1, 13, 31, 47, 403, 611, 1109, 1457, 14417, 18941, 34379, 52123, 446927, 677599, 1615813, 21005569]

約数ペア:

[(1, 21005569), (13, 1615813), (31, 677599), (47, 446927), (403, 52123), (611, 34379), (1109, 18941), (1457, 14417)]