81217540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{94439}}^1$

素因数の和:94491

約数の個数: 24

約数和(自身を含む): 174525120

約数和(自身を除く): 93307580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 94439, 188878, 377756, 472195, 944390, 1888780, 4060877, 8121754, 16243508, 20304385, 40608770, 81217540]

約数ペア:

[(1, 81217540), (2, 40608770), (4, 20304385), (5, 16243508), (10, 8121754), (20, 4060877), (43, 1888780), (86, 944390), (172, 472195), (215, 377756), (430, 188878), (860, 94439)]