20543978

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{457}}^1$

素因数の和:511

約数の個数: 48

約数和(自身を含む): 40230720

約数和(自身を除く): 19686742

約数列:

[1, 2, 7, 13, 14, 19, 26, 38, 91, 133, 169, 182, 247, 266, 338, 457, 494, 914, 1183, 1729, 2366, 3199, 3211, 3458, 5941, 6398, 6422, 8683, 11882, 17366, 22477, 41587, 44954, 60781, 77233, 83174, 112879, 121562, 154466, 225758, 540631, 790153, 1081262, 1467427, 1580306, 2934854, 10271989, 20543978]

約数ペア:

[(1, 20543978), (2, 10271989), (7, 2934854), (13, 1580306), (14, 1467427), (19, 1081262), (26, 790153), (38, 540631), (91, 225758), (133, 154466), (169, 121562), (182, 112879), (247, 83174), (266, 77233), (338, 60781), (457, 44954), (494, 41587), (914, 22477), (1183, 17366), (1729, 11882), (2366, 8683), (3199, 6422), (3211, 6398), (3458, 5941)]