21147160

素因数分解:

$2^3\times 5^1\times {\mathrm{528679}}^1$

素因数の和:528690

約数の個数: 16

約数和(自身を含む): 47581200

約数和(自身を除く): 26434040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528679, 1057358, 2114716, 2643395, 4229432, 5286790, 10573580, 21147160]

約数ペア:

[(1, 21147160), (2, 10573580), (4, 5286790), (5, 4229432), (8, 2643395), (10, 2114716), (20, 1057358), (40, 528679)]