21305210

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{49547}}^1$

素因数の和:49597

約数の個数: 16

約数和(自身を含む): 39242016

約数和(自身を除く): 17936806

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 49547, 99094, 247735, 495470, 2130521, 4261042, 10652605, 21305210]

約数ペア:

[(1, 21305210), (2, 10652605), (5, 4261042), (10, 2130521), (43, 495470), (86, 247735), (215, 99094), (430, 49547)]