19780250

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 43130880

約数和(自身を除く): 23350630

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 89, 125, 127, 175, 178, 250, 254, 350, 445, 623, 635, 875, 889, 890, 1246, 1270, 1750, 1778, 2225, 3115, 3175, 4445, 4450, 6230, 6350, 8890, 11125, 11303, 15575, 15875, 22225, 22250, 22606, 31150, 31750, 44450, 56515, 77875, 79121, 111125, 113030, 155750, 158242, 222250, 282575, 395605, 565150, 791210, 1412875, 1978025, 2825750, 3956050, 9890125, 19780250]

約数ペア:

[(1, 19780250), (2, 9890125), (5, 3956050), (7, 2825750), (10, 1978025), (14, 1412875), (25, 791210), (35, 565150), (50, 395605), (70, 282575), (89, 222250), (125, 158242), (127, 155750), (175, 113030), (178, 111125), (250, 79121), (254, 77875), (350, 56515), (445, 44450), (623, 31750), (635, 31150), (875, 22606), (889, 22250), (890, 22225), (1246, 15875), (1270, 15575), (1750, 11303), (1778, 11125), (2225, 8890), (3115, 6350), (3175, 6230), (4445, 4450)]