19998977999

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{373}}^1\times {\mathrm{1847}}^1$

素因数の和:2280

約数の個数: 64

約数和(自身を含む): 27867248640

約数和(自身を除く): 7868270641

約数列:

[1, 7, 11, 13, 29, 77, 91, 143, 203, 319, 373, 377, 1001, 1847, 2233, 2611, 2639, 4103, 4147, 4849, 10817, 12929, 20317, 24011, 28721, 29029, 33943, 53339, 53563, 75719, 118987, 140621, 142219, 168077, 264121, 373373, 374941, 589193, 688931, 696319, 832909, 984347, 1546831, 1848847, 4124351, 4822517, 4874233, 7578241, 7659509, 8956103, 10827817, 19978999, 53047687, 53616563, 62692721, 98517133, 139852993, 219768989, 259726987, 689619931, 1538382923, 1818088909, 2856996857, 19998977999]

約数ペア:

[(1, 19998977999), (7, 2856996857), (11, 1818088909), (13, 1538382923), (29, 689619931), (77, 259726987), (91, 219768989), (143, 139852993), (203, 98517133), (319, 62692721), (373, 53616563), (377, 53047687), (1001, 19978999), (1847, 10827817), (2233, 8956103), (2611, 7659509), (2639, 7578241), (4103, 4874233), (4147, 4822517), (4849, 4124351), (10817, 1848847), (12929, 1546831), (20317, 984347), (24011, 832909), (28721, 696319), (29029, 688931), (33943, 589193), (53339, 374941), (53563, 373373), (75719, 264121), (118987, 168077), (140621, 142219)]