20490316

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{937}}^1$

素因数の和:1030

約数の個数: 48

約数和(自身を含む): 45384192

約数和(自身を除く): 24893876

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 71, 77, 142, 154, 284, 308, 497, 781, 937, 994, 1562, 1874, 1988, 3124, 3748, 5467, 6559, 10307, 10934, 13118, 20614, 21868, 26236, 41228, 66527, 72149, 133054, 144298, 266108, 288596, 465689, 731797, 931378, 1463594, 1862756, 2927188, 5122579, 10245158, 20490316]

約数ペア:

[(1, 20490316), (2, 10245158), (4, 5122579), (7, 2927188), (11, 1862756), (14, 1463594), (22, 931378), (28, 731797), (44, 465689), (71, 288596), (77, 266108), (142, 144298), (154, 133054), (284, 72149), (308, 66527), (497, 41228), (781, 26236), (937, 21868), (994, 20614), (1562, 13118), (1874, 10934), (1988, 10307), (3124, 6559), (3748, 5467)]