81116560

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{20693}}^1$

素因数の和:20720

約数の個数: 60

約数和(自身を含む): 219397788

約数和(自身を除く): 138281228

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 20693, 41386, 82772, 103465, 144851, 165544, 206930, 289702, 331088, 413860, 579404, 724255, 827720, 1013957, 1158808, 1448510, 1655440, 2027914, 2317616, 2897020, 4055828, 5069785, 5794040, 8111656, 10139570, 11588080, 16223312, 20279140, 40558280, 81116560]

約数ペア:

[(1, 81116560), (2, 40558280), (4, 20279140), (5, 16223312), (7, 11588080), (8, 10139570), (10, 8111656), (14, 5794040), (16, 5069785), (20, 4055828), (28, 2897020), (35, 2317616), (40, 2027914), (49, 1655440), (56, 1448510), (70, 1158808), (80, 1013957), (98, 827720), (112, 724255), (140, 579404), (196, 413860), (245, 331088), (280, 289702), (392, 206930), (490, 165544), (560, 144851), (784, 103465), (980, 82772), (1960, 41386), (3920, 20693)]