21381019

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2659}}^1$

素因数の和:2730

約数の個数: 16

約数和(自身を含む): 25280640

約数和(自身を除く): 3899621

約数列:

[1, 11, 17, 43, 187, 473, 731, 2659, 8041, 29249, 45203, 114337, 497233, 1257707, 1943729, 21381019]

約数ペア:

[(1, 21381019), (11, 1943729), (17, 1257707), (43, 497233), (187, 114337), (473, 45203), (731, 29249), (2659, 8041)]