21157160

素因数分解:

$2^3\times 5^1\times {\mathrm{528929}}^1$

素因数の和:528940

約数の個数: 16

約数和(自身を含む): 47603700

約数和(自身を除く): 26446540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528929, 1057858, 2115716, 2644645, 4231432, 5289290, 10578580, 21157160]

約数ペア:

[(1, 21157160), (2, 10578580), (4, 5289290), (5, 4231432), (8, 2644645), (10, 2115716), (20, 1057858), (40, 528929)]