20178980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21467}}^1$

素因数の和:21523

約数の個数: 24

約数和(自身を含む): 43279488

約数和(自身を除く): 23100508

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21467, 42934, 85868, 107335, 214670, 429340, 1008949, 2017898, 4035796, 5044745, 10089490, 20178980]

約数ペア:

[(1, 20178980), (2, 10089490), (4, 5044745), (5, 4035796), (10, 2017898), (20, 1008949), (47, 429340), (94, 214670), (188, 107335), (235, 85868), (470, 42934), (940, 21467)]