16820720

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{613}}^1$

素因数の和:647

約数の個数: 80

約数和(自身を含む): 45681600

約数和(自身を除く): 28860880

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, 343, 392, 490, 560, 613, 686, 784, 980, 1226, 1372, 1715, 1960, 2452, 2744, 3065, 3430, 3920, 4291, 4904, 5488, 6130, 6860, 8582, 9808, 12260, 13720, 17164, 21455, 24520, 27440, 30037, 34328, 42910, 49040, 60074, 68656, 85820, 120148, 150185, 171640, 210259, 240296, 300370, 343280, 420518, 480592, 600740, 841036, 1051295, 1201480, 1682072, 2102590, 2402960, 3364144, 4205180, 8410360, 16820720]

約数ペア:

[(1, 16820720), (2, 8410360), (4, 4205180), (5, 3364144), (7, 2402960), (8, 2102590), (10, 1682072), (14, 1201480), (16, 1051295), (20, 841036), (28, 600740), (35, 480592), (40, 420518), (49, 343280), (56, 300370), (70, 240296), (80, 210259), (98, 171640), (112, 150185), (140, 120148), (196, 85820), (245, 68656), (280, 60074), (343, 49040), (392, 42910), (490, 34328), (560, 30037), (613, 27440), (686, 24520), (784, 21455), (980, 17164), (1226, 13720), (1372, 12260), (1715, 9808), (1960, 8582), (2452, 6860), (2744, 6130), (3065, 5488), (3430, 4904), (3920, 4291)]