20518960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3331}}^1$

素因数の和:3362

約数の個数: 80

約数和(自身を含む): 59496192

約数和(自身を除く): 38977232

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 3331, 6160, 6662, 13324, 16655, 23317, 26648, 33310, 36641, 46634, 53296, 66620, 73282, 93268, 116585, 133240, 146564, 183205, 186536, 233170, 256487, 266480, 293128, 366410, 373072, 466340, 512974, 586256, 732820, 932680, 1025948, 1282435, 1465640, 1865360, 2051896, 2564870, 2931280, 4103792, 5129740, 10259480, 20518960]

約数ペア:

[(1, 20518960), (2, 10259480), (4, 5129740), (5, 4103792), (7, 2931280), (8, 2564870), (10, 2051896), (11, 1865360), (14, 1465640), (16, 1282435), (20, 1025948), (22, 932680), (28, 732820), (35, 586256), (40, 512974), (44, 466340), (55, 373072), (56, 366410), (70, 293128), (77, 266480), (80, 256487), (88, 233170), (110, 186536), (112, 183205), (140, 146564), (154, 133240), (176, 116585), (220, 93268), (280, 73282), (308, 66620), (385, 53296), (440, 46634), (560, 36641), (616, 33310), (770, 26648), (880, 23317), (1232, 16655), (1540, 13324), (3080, 6662), (3331, 6160)]