21376957

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{1657}}^1$

素因数の和:1780

約数の個数: 16

約数和(自身を含む): 25997440

約数和(自身を除く): 4620483

約数列:

[1, 7, 19, 97, 133, 679, 1657, 1843, 11599, 12901, 31483, 160729, 220381, 1125103, 3053851, 21376957]

約数ペア:

[(1, 21376957), (7, 3053851), (19, 1125103), (97, 220381), (133, 160729), (679, 31483), (1657, 12901), (1843, 11599)]