20564240

素因数分解:

$2^4\times 5^1\times {\mathrm{257053}}^1$

素因数の和:257066

約数の個数: 20

約数和(自身を含む): 47812044

約数和(自身を除く): 27247804

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257053, 514106, 1028212, 1285265, 2056424, 2570530, 4112848, 5141060, 10282120, 20564240]

約数ペア:

[(1, 20564240), (2, 10282120), (4, 5141060), (5, 4112848), (8, 2570530), (10, 2056424), (16, 1285265), (20, 1028212), (40, 514106), (80, 257053)]