20921120

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11887}}^1$

素因数の和:11913

約数の個数: 48

約数和(自身を含む): 53923968

約数和(自身を除く): 33002848

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11887, 23774, 47548, 59435, 95096, 118870, 130757, 190192, 237740, 261514, 380384, 475480, 523028, 653785, 950960, 1046056, 1307570, 1901920, 2092112, 2615140, 4184224, 5230280, 10460560, 20921120]

約数ペア:

[(1, 20921120), (2, 10460560), (4, 5230280), (5, 4184224), (8, 2615140), (10, 2092112), (11, 1901920), (16, 1307570), (20, 1046056), (22, 950960), (32, 653785), (40, 523028), (44, 475480), (55, 380384), (80, 261514), (88, 237740), (110, 190192), (160, 130757), (176, 118870), (220, 95096), (352, 59435), (440, 47548), (880, 23774), (1760, 11887)]