639929759

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{263}}^1$

素因数の和:444

約数の個数: 48

約数和(自身を含む): 832094208

約数和(自身を除く): 192164449

約数列:

[1, 7, 17, 23, 49, 119, 127, 161, 263, 391, 833, 889, 1127, 1841, 2159, 2737, 2921, 4471, 6049, 6223, 12887, 15113, 19159, 20447, 31297, 33401, 42343, 49657, 102833, 105791, 143129, 219079, 233807, 296401, 347599, 567817, 719831, 768223, 1636649, 2433193, 3974719, 5038817, 5377561, 13059791, 27823033, 37642927, 91418537, 639929759]

約数ペア:

[(1, 639929759), (7, 91418537), (17, 37642927), (23, 27823033), (49, 13059791), (119, 5377561), (127, 5038817), (161, 3974719), (263, 2433193), (391, 1636649), (833, 768223), (889, 719831), (1127, 567817), (1841, 347599), (2159, 296401), (2737, 233807), (2921, 219079), (4471, 143129), (6049, 105791), (6223, 102833), (12887, 49657), (15113, 42343), (19159, 33401), (20447, 31297)]