21978068

素因数分解:

$2^2\times 7^3\times {\mathrm{83}}^1\times {\mathrm{193}}^1$

素因数の和:301

約数の個数: 48

約数和(自身を含む): 45628800

約数和(自身を除く): 23650732

約数列:

[1, 2, 4, 7, 14, 28, 49, 83, 98, 166, 193, 196, 332, 343, 386, 581, 686, 772, 1162, 1351, 1372, 2324, 2702, 4067, 5404, 8134, 9457, 16019, 16268, 18914, 28469, 32038, 37828, 56938, 64076, 66199, 112133, 113876, 132398, 224266, 264796, 448532, 784931, 1569862, 3139724, 5494517, 10989034, 21978068]

約数ペア:

[(1, 21978068), (2, 10989034), (4, 5494517), (7, 3139724), (14, 1569862), (28, 784931), (49, 448532), (83, 264796), (98, 224266), (166, 132398), (193, 113876), (196, 112133), (332, 66199), (343, 64076), (386, 56938), (581, 37828), (686, 32038), (772, 28469), (1162, 18914), (1351, 16268), (1372, 16019), (2324, 9457), (2702, 8134), (4067, 5404)]