81315364

素因数分解:

$2^2\times {\mathrm{13}}^3\times {\mathrm{19}}^1\times {\mathrm{487}}^1$

素因数の和:549

約数の個数: 48

約数和(自身を含む): 162601600

約数和(自身を除く): 81286236

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 169, 247, 338, 487, 494, 676, 974, 988, 1948, 2197, 3211, 4394, 6331, 6422, 8788, 9253, 12662, 12844, 18506, 25324, 37012, 41743, 82303, 83486, 120289, 164606, 166972, 240578, 329212, 481156, 1069939, 1563757, 2139878, 3127514, 4279756, 6255028, 20328841, 40657682, 81315364]

約数ペア:

[(1, 81315364), (2, 40657682), (4, 20328841), (13, 6255028), (19, 4279756), (26, 3127514), (38, 2139878), (52, 1563757), (76, 1069939), (169, 481156), (247, 329212), (338, 240578), (487, 166972), (494, 164606), (676, 120289), (974, 83486), (988, 82303), (1948, 41743), (2197, 37012), (3211, 25324), (4394, 18506), (6331, 12844), (6422, 12662), (8788, 9253)]