18672920

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1361}}^1$

素因数の和:1393

約数の個数: 64

約数和(自身を含む): 49032000

約数和(自身を除く): 30359080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1361, 1372, 1715, 1960, 2722, 2744, 3430, 5444, 6805, 6860, 9527, 10888, 13610, 13720, 19054, 27220, 38108, 47635, 54440, 66689, 76216, 95270, 133378, 190540, 266756, 333445, 381080, 466823, 533512, 666890, 933646, 1333780, 1867292, 2334115, 2667560, 3734584, 4668230, 9336460, 18672920]

約数ペア:

[(1, 18672920), (2, 9336460), (4, 4668230), (5, 3734584), (7, 2667560), (8, 2334115), (10, 1867292), (14, 1333780), (20, 933646), (28, 666890), (35, 533512), (40, 466823), (49, 381080), (56, 333445), (70, 266756), (98, 190540), (140, 133378), (196, 95270), (245, 76216), (280, 66689), (343, 54440), (392, 47635), (490, 38108), (686, 27220), (980, 19054), (1361, 13720), (1372, 13610), (1715, 10888), (1960, 9527), (2722, 6860), (2744, 6805), (3430, 5444)]