20697280

素因数分解:

$2^6\times 5^1\times {\mathrm{64679}}^1$

素因数の和:64696

約数の個数: 28

約数和(自身を含む): 49286160

約数和(自身を除く): 28588880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 64679, 129358, 258716, 323395, 517432, 646790, 1034864, 1293580, 2069728, 2587160, 4139456, 5174320, 10348640, 20697280]

約数ペア:

[(1, 20697280), (2, 10348640), (4, 5174320), (5, 4139456), (8, 2587160), (10, 2069728), (16, 1293580), (20, 1034864), (32, 646790), (40, 517432), (64, 323395), (80, 258716), (160, 129358), (320, 64679)]