16978120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{9871}}^1$

素因数の和:9925

約数の個数: 32

約数和(自身を含む): 39093120

約数和(自身を除く): 22115000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 9871, 19742, 39484, 49355, 78968, 98710, 197420, 394840, 424453, 848906, 1697812, 2122265, 3395624, 4244530, 8489060, 16978120]

約数ペア:

[(1, 16978120), (2, 8489060), (4, 4244530), (5, 3395624), (8, 2122265), (10, 1697812), (20, 848906), (40, 424453), (43, 394840), (86, 197420), (172, 98710), (215, 78968), (344, 49355), (430, 39484), (860, 19742), (1720, 9871)]