21131877

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12601}}^1$

素因数の和:12660

約数の個数: 16

約数和(自身を含む): 31051328

約数和(自身を除く): 9919451

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12601, 37803, 163813, 491439, 541843, 1625529, 7043959, 21131877]

約数ペア:

[(1, 21131877), (3, 7043959), (13, 1625529), (39, 541843), (43, 491439), (129, 163813), (559, 37803), (1677, 12601)]