66686980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{77543}}^1$

素因数の和:77595

約数の個数: 24

約数和(自身を含む): 143301312

約数和(自身を除く): 76614332

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 77543, 155086, 310172, 387715, 775430, 1550860, 3334349, 6668698, 13337396, 16671745, 33343490, 66686980]

約数ペア:

[(1, 66686980), (2, 33343490), (4, 16671745), (5, 13337396), (10, 6668698), (20, 3334349), (43, 1550860), (86, 775430), (172, 387715), (215, 310172), (430, 155086), (860, 77543)]