19977188

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1753}}^1$

素因数の和:1812

約数の個数: 48

約数和(自身を含む): 44790144

約数和(自身を除く): 24812956

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 37, 44, 74, 77, 148, 154, 259, 308, 407, 518, 814, 1036, 1628, 1753, 2849, 3506, 5698, 7012, 11396, 12271, 19283, 24542, 38566, 49084, 64861, 77132, 129722, 134981, 259444, 269962, 454027, 539924, 713471, 908054, 1426942, 1816108, 2853884, 4994297, 9988594, 19977188]

約数ペア:

[(1, 19977188), (2, 9988594), (4, 4994297), (7, 2853884), (11, 1816108), (14, 1426942), (22, 908054), (28, 713471), (37, 539924), (44, 454027), (74, 269962), (77, 259444), (148, 134981), (154, 129722), (259, 77132), (308, 64861), (407, 49084), (518, 38566), (814, 24542), (1036, 19283), (1628, 12271), (1753, 11396), (2849, 7012), (3506, 5698)]