20309080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{457}}^1$

素因数の和:580

約数の個数: 64

約数和(自身を含む): 50453280

約数和(自身を除く): 30144200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 101, 110, 202, 220, 404, 440, 457, 505, 808, 914, 1010, 1111, 1828, 2020, 2222, 2285, 3656, 4040, 4444, 4570, 5027, 5555, 8888, 9140, 10054, 11110, 18280, 20108, 22220, 25135, 40216, 44440, 46157, 50270, 92314, 100540, 184628, 201080, 230785, 369256, 461570, 507727, 923140, 1015454, 1846280, 2030908, 2538635, 4061816, 5077270, 10154540, 20309080]

約数ペア:

[(1, 20309080), (2, 10154540), (4, 5077270), (5, 4061816), (8, 2538635), (10, 2030908), (11, 1846280), (20, 1015454), (22, 923140), (40, 507727), (44, 461570), (55, 369256), (88, 230785), (101, 201080), (110, 184628), (202, 100540), (220, 92314), (404, 50270), (440, 46157), (457, 44440), (505, 40216), (808, 25135), (914, 22220), (1010, 20108), (1111, 18280), (1828, 11110), (2020, 10054), (2222, 9140), (2285, 8888), (3656, 5555), (4040, 5027), (4444, 4570)]