66812540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{77689}}^1$

素因数の和:77741

約数の個数: 24

約数和(自身を含む): 143571120

約数和(自身を除く): 76758580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 77689, 155378, 310756, 388445, 776890, 1553780, 3340627, 6681254, 13362508, 16703135, 33406270, 66812540]

約数ペア:

[(1, 66812540), (2, 33406270), (4, 16703135), (5, 13362508), (10, 6681254), (20, 3340627), (43, 1553780), (86, 776890), (172, 388445), (215, 310756), (430, 155378), (860, 77689)]