21741280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1123}}^1$

素因数の和:1160

約数の個数: 72

約数和(自身を含む): 56507976

約数和(自身を除く): 34766696

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1123, 1210, 1760, 1936, 2246, 2420, 3872, 4492, 4840, 5615, 8984, 9680, 11230, 12353, 17968, 19360, 22460, 24706, 35936, 44920, 49412, 61765, 89840, 98824, 123530, 135883, 179680, 197648, 247060, 271766, 395296, 494120, 543532, 679415, 988240, 1087064, 1358830, 1976480, 2174128, 2717660, 4348256, 5435320, 10870640, 21741280]

約数ペア:

[(1, 21741280), (2, 10870640), (4, 5435320), (5, 4348256), (8, 2717660), (10, 2174128), (11, 1976480), (16, 1358830), (20, 1087064), (22, 988240), (32, 679415), (40, 543532), (44, 494120), (55, 395296), (80, 271766), (88, 247060), (110, 197648), (121, 179680), (160, 135883), (176, 123530), (220, 98824), (242, 89840), (352, 61765), (440, 49412), (484, 44920), (605, 35936), (880, 24706), (968, 22460), (1123, 19360), (1210, 17968), (1760, 12353), (1936, 11230), (2246, 9680), (2420, 8984), (3872, 5615), (4492, 4840)]