20947520

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^2\times {\mathrm{541}}^1$

素因数の和:580

約数の個数: 84

約数和(自身を含む): 54929532

約数和(自身を除く): 33982012

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 121, 160, 176, 220, 242, 320, 352, 440, 484, 541, 605, 704, 880, 968, 1082, 1210, 1760, 1936, 2164, 2420, 2705, 3520, 3872, 4328, 4840, 5410, 5951, 7744, 8656, 9680, 10820, 11902, 17312, 19360, 21640, 23804, 29755, 34624, 38720, 43280, 47608, 59510, 65461, 86560, 95216, 119020, 130922, 173120, 190432, 238040, 261844, 327305, 380864, 476080, 523688, 654610, 952160, 1047376, 1309220, 1904320, 2094752, 2618440, 4189504, 5236880, 10473760, 20947520]

約数ペア:

[(1, 20947520), (2, 10473760), (4, 5236880), (5, 4189504), (8, 2618440), (10, 2094752), (11, 1904320), (16, 1309220), (20, 1047376), (22, 952160), (32, 654610), (40, 523688), (44, 476080), (55, 380864), (64, 327305), (80, 261844), (88, 238040), (110, 190432), (121, 173120), (160, 130922), (176, 119020), (220, 95216), (242, 86560), (320, 65461), (352, 59510), (440, 47608), (484, 43280), (541, 38720), (605, 34624), (704, 29755), (880, 23804), (968, 21640), (1082, 19360), (1210, 17312), (1760, 11902), (1936, 10820), (2164, 9680), (2420, 8656), (2705, 7744), (3520, 5951), (3872, 5410), (4328, 4840)]