21154679

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7499}}^1$

素因数の和:7550

約数の個数: 16

約数和(自身を含む): 26880000

約数和(自身を除く): 5725321

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 7499, 52493, 97487, 232469, 682409, 1627283, 3022097, 21154679]

約数ペア:

[(1, 21154679), (7, 3022097), (13, 1627283), (31, 682409), (91, 232469), (217, 97487), (403, 52493), (2821, 7499)]