20621920

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11717}}^1$

素因数の和:11743

約数の個数: 48

約数和(自身を含む): 53152848

約数和(自身を除く): 32530928

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, 11717, 23434, 46868, 58585, 93736, 117170, 128887, 187472, 234340, 257774, 374944, 468680, 515548, 644435, 937360, 1031096, 1288870, 1874720, 2062192, 2577740, 4124384, 5155480, 10310960, 20621920]

約数ペア:

[(1, 20621920), (2, 10310960), (4, 5155480), (5, 4124384), (8, 2577740), (10, 2062192), (11, 1874720), (16, 1288870), (20, 1031096), (22, 937360), (32, 644435), (40, 515548), (44, 468680), (55, 374944), (80, 257774), (88, 234340), (110, 187472), (160, 128887), (176, 117170), (220, 93736), (352, 58585), (440, 46868), (880, 23434), (1760, 11717)]