21121683

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{233}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 32078592

約数和(自身を除く): 10956909

約数列:

[1, 3, 11, 33, 41, 67, 123, 201, 233, 451, 699, 737, 1353, 2211, 2563, 2747, 7689, 8241, 9553, 15611, 28659, 30217, 46833, 90651, 105083, 171721, 315249, 515163, 640051, 1920153, 7040561, 21121683]

約数ペア:

[(1, 21121683), (3, 7040561), (11, 1920153), (33, 640051), (41, 515163), (67, 315249), (123, 171721), (201, 105083), (233, 90651), (451, 46833), (699, 30217), (737, 28659), (1353, 15611), (2211, 9553), (2563, 8241), (2747, 7689)]