20774240

素因数分解:

$2^5\times 5^1\times {\mathrm{157}}^1\times {\mathrm{827}}^1$

素因数の和:999

約数の個数: 48

約数和(自身を含む): 49451472

約数和(自身を除く): 28677232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 157, 160, 314, 628, 785, 827, 1256, 1570, 1654, 2512, 3140, 3308, 4135, 5024, 6280, 6616, 8270, 12560, 13232, 16540, 25120, 26464, 33080, 66160, 129839, 132320, 259678, 519356, 649195, 1038712, 1298390, 2077424, 2596780, 4154848, 5193560, 10387120, 20774240]

約数ペア:

[(1, 20774240), (2, 10387120), (4, 5193560), (5, 4154848), (8, 2596780), (10, 2077424), (16, 1298390), (20, 1038712), (32, 649195), (40, 519356), (80, 259678), (157, 132320), (160, 129839), (314, 66160), (628, 33080), (785, 26464), (827, 25120), (1256, 16540), (1570, 13232), (1654, 12560), (2512, 8270), (3140, 6616), (3308, 6280), (4135, 5024)]