21271929

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3911}}^1$

素因数の和:3965

約数の個数: 24

約数和(自身を含む): 33893568

約数和(自身を除く): 12621639

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3911, 5439, 11733, 27377, 82131, 144707, 191639, 434121, 574917, 1012949, 3038847, 7090643, 21271929]

約数ペア:

[(1, 21271929), (3, 7090643), (7, 3038847), (21, 1012949), (37, 574917), (49, 434121), (111, 191639), (147, 144707), (259, 82131), (777, 27377), (1813, 11733), (3911, 5439)]