21465724

素因数分解:

$2^2\times 7^2\times {\mathrm{109519}}^1$

素因数の和:109537

約数の個数: 18

約数和(自身を含む): 43698480

約数和(自身を除く): 22232756

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 109519, 219038, 438076, 766633, 1533266, 3066532, 5366431, 10732862, 21465724]

約数ペア:

[(1, 21465724), (2, 10732862), (4, 5366431), (7, 3066532), (14, 1533266), (28, 766633), (49, 438076), (98, 219038), (196, 109519)]