18813704

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:670

約数の個数: 64

約数和(自身を含む): 44499840

約数和(自身を除く): 25686136

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 43, 52, 56, 86, 91, 104, 172, 182, 301, 344, 364, 559, 601, 602, 728, 1118, 1202, 1204, 2236, 2404, 2408, 3913, 4207, 4472, 4808, 7813, 7826, 8414, 15626, 15652, 16828, 25843, 31252, 31304, 33656, 51686, 54691, 62504, 103372, 109382, 180901, 206744, 218764, 335959, 361802, 437528, 671918, 723604, 1343836, 1447208, 2351713, 2687672, 4703426, 9406852, 18813704]

約数ペア:

[(1, 18813704), (2, 9406852), (4, 4703426), (7, 2687672), (8, 2351713), (13, 1447208), (14, 1343836), (26, 723604), (28, 671918), (43, 437528), (52, 361802), (56, 335959), (86, 218764), (91, 206744), (104, 180901), (172, 109382), (182, 103372), (301, 62504), (344, 54691), (364, 51686), (559, 33656), (601, 31304), (602, 31252), (728, 25843), (1118, 16828), (1202, 15652), (1204, 15626), (2236, 8414), (2404, 7826), (2408, 7813), (3913, 4808), (4207, 4472)]