19777760

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1741}}^1$

素因数の和:1827

約数の個数: 48

約数和(自身を含む): 47410272

約数和(自身を除く): 27632512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1741, 2272, 2840, 3482, 5680, 6964, 8705, 11360, 13928, 17410, 27856, 34820, 55712, 69640, 123611, 139280, 247222, 278560, 494444, 618055, 988888, 1236110, 1977776, 2472220, 3955552, 4944440, 9888880, 19777760]

約数ペア:

[(1, 19777760), (2, 9888880), (4, 4944440), (5, 3955552), (8, 2472220), (10, 1977776), (16, 1236110), (20, 988888), (32, 618055), (40, 494444), (71, 278560), (80, 247222), (142, 139280), (160, 123611), (284, 69640), (355, 55712), (568, 34820), (710, 27856), (1136, 17410), (1420, 13928), (1741, 11360), (2272, 8705), (2840, 6964), (3482, 5680)]