8872220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 21504000

約数和(自身を除く): 12631780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 499, 508, 635, 889, 998, 1270, 1778, 1996, 2495, 2540, 3493, 3556, 4445, 4990, 6986, 8890, 9980, 13972, 17465, 17780, 34930, 63373, 69860, 126746, 253492, 316865, 443611, 633730, 887222, 1267460, 1774444, 2218055, 4436110, 8872220]

約数ペア:

[(1, 8872220), (2, 4436110), (4, 2218055), (5, 1774444), (7, 1267460), (10, 887222), (14, 633730), (20, 443611), (28, 316865), (35, 253492), (70, 126746), (127, 69860), (140, 63373), (254, 34930), (499, 17780), (508, 17465), (635, 13972), (889, 9980), (998, 8890), (1270, 6986), (1778, 4990), (1996, 4445), (2495, 3556), (2540, 3493)]