21197230

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19447}}^1$

素因数の和:19563

約数の個数: 16

約数和(自身を含む): 38507040

約数和(自身を除く): 17309810

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19447, 38894, 97235, 194470, 2119723, 4239446, 10598615, 21197230]

約数ペア:

[(1, 21197230), (2, 10598615), (5, 4239446), (10, 2119723), (109, 194470), (218, 97235), (545, 38894), (1090, 19447)]