80989720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289249}}^1$

素因数の和:289267

約数の個数: 32

約数和(自身を含む): 208260000

約数和(自身を除く): 127270280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289249, 578498, 1156996, 1446245, 2024743, 2313992, 2892490, 4049486, 5784980, 8098972, 10123715, 11569960, 16197944, 20247430, 40494860, 80989720]

約数ペア:

[(1, 80989720), (2, 40494860), (4, 20247430), (5, 16197944), (7, 11569960), (8, 10123715), (10, 8098972), (14, 5784980), (20, 4049486), (28, 2892490), (35, 2313992), (40, 2024743), (56, 1446245), (70, 1156996), (140, 578498), (280, 289249)]