21884420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25447}}^1$

素因数の和:25499

約数の個数: 24

約数和(自身を含む): 47027904

約数和(自身を除く): 25143484

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25447, 50894, 101788, 127235, 254470, 508940, 1094221, 2188442, 4376884, 5471105, 10942210, 21884420]

約数ペア:

[(1, 21884420), (2, 10942210), (4, 5471105), (5, 4376884), (10, 2188442), (20, 1094221), (43, 508940), (86, 254470), (172, 127235), (215, 101788), (430, 50894), (860, 25447)]