20380976

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 50139648

約数和(自身を除く): 29758672

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 71, 77, 88, 112, 142, 154, 176, 233, 284, 308, 466, 497, 568, 616, 781, 932, 994, 1136, 1232, 1562, 1631, 1864, 1988, 2563, 3124, 3262, 3728, 3976, 5126, 5467, 6248, 6524, 7952, 10252, 10934, 12496, 13048, 16543, 17941, 20504, 21868, 26096, 33086, 35882, 41008, 43736, 66172, 71764, 87472, 115801, 132344, 143528, 181973, 231602, 264688, 287056, 363946, 463204, 727892, 926408, 1273811, 1455784, 1852816, 2547622, 2911568, 5095244, 10190488, 20380976]

約数ペア:

[(1, 20380976), (2, 10190488), (4, 5095244), (7, 2911568), (8, 2547622), (11, 1852816), (14, 1455784), (16, 1273811), (22, 926408), (28, 727892), (44, 463204), (56, 363946), (71, 287056), (77, 264688), (88, 231602), (112, 181973), (142, 143528), (154, 132344), (176, 115801), (233, 87472), (284, 71764), (308, 66172), (466, 43736), (497, 41008), (568, 35882), (616, 33086), (781, 26096), (932, 21868), (994, 20504), (1136, 17941), (1232, 16543), (1562, 13048), (1631, 12496), (1864, 10934), (1988, 10252), (2563, 7952), (3124, 6524), (3262, 6248), (3728, 5467), (3976, 5126)]