19680780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{997}}^1$

素因数の和:1063

約数の個数: 96

約数和(自身を含む): 64382976

約数和(自身を除く): 44702196

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 47, 60, 70, 84, 94, 105, 140, 141, 188, 210, 235, 282, 329, 420, 470, 564, 658, 705, 940, 987, 997, 1316, 1410, 1645, 1974, 1994, 2820, 2991, 3290, 3948, 3988, 4935, 4985, 5982, 6580, 6979, 9870, 9970, 11964, 13958, 14955, 19740, 19940, 20937, 27916, 29910, 34895, 41874, 46859, 59820, 69790, 83748, 93718, 104685, 139580, 140577, 187436, 209370, 234295, 281154, 328013, 418740, 468590, 562308, 656026, 702885, 937180, 984039, 1312052, 1405770, 1640065, 1968078, 2811540, 3280130, 3936156, 4920195, 6560260, 9840390, 19680780]

約数ペア:

[(1, 19680780), (2, 9840390), (3, 6560260), (4, 4920195), (5, 3936156), (6, 3280130), (7, 2811540), (10, 1968078), (12, 1640065), (14, 1405770), (15, 1312052), (20, 984039), (21, 937180), (28, 702885), (30, 656026), (35, 562308), (42, 468590), (47, 418740), (60, 328013), (70, 281154), (84, 234295), (94, 209370), (105, 187436), (140, 140577), (141, 139580), (188, 104685), (210, 93718), (235, 83748), (282, 69790), (329, 59820), (420, 46859), (470, 41874), (564, 34895), (658, 29910), (705, 27916), (940, 20937), (987, 19940), (997, 19740), (1316, 14955), (1410, 13958), (1645, 11964), (1974, 9970), (1994, 9870), (2820, 6979), (2991, 6580), (3290, 5982), (3948, 4985), (3988, 4935)]