20816180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1931}}^1$

素因数の和:1965

約数の個数: 72

約数和(自身を含む): 55502496

約数和(自身を除く): 34686316

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 1931, 2156, 2695, 3862, 5390, 7724, 9655, 10780, 13517, 19310, 21241, 27034, 38620, 42482, 54068, 67585, 84964, 94619, 106205, 135170, 148687, 189238, 212410, 270340, 297374, 378476, 424820, 473095, 594748, 743435, 946190, 1040809, 1486870, 1892380, 2081618, 2973740, 4163236, 5204045, 10408090, 20816180]

約数ペア:

[(1, 20816180), (2, 10408090), (4, 5204045), (5, 4163236), (7, 2973740), (10, 2081618), (11, 1892380), (14, 1486870), (20, 1040809), (22, 946190), (28, 743435), (35, 594748), (44, 473095), (49, 424820), (55, 378476), (70, 297374), (77, 270340), (98, 212410), (110, 189238), (140, 148687), (154, 135170), (196, 106205), (220, 94619), (245, 84964), (308, 67585), (385, 54068), (490, 42482), (539, 38620), (770, 27034), (980, 21241), (1078, 19310), (1540, 13517), (1931, 10780), (2156, 9655), (2695, 7724), (3862, 5390)]