20664315

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:258

約数の個数: 80

約数和(自身を含む): 43699392

約数和(自身を除く): 23035077

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 37, 45, 63, 81, 105, 111, 135, 185, 189, 197, 259, 315, 333, 405, 555, 567, 591, 777, 945, 985, 999, 1295, 1379, 1665, 1773, 2331, 2835, 2955, 2997, 3885, 4137, 4995, 5319, 6895, 6993, 7289, 8865, 11655, 12411, 14985, 15957, 20685, 20979, 21867, 26595, 34965, 36445, 37233, 51023, 62055, 65601, 79785, 104895, 109335, 111699, 153069, 186165, 196803, 255115, 328005, 459207, 558495, 590409, 765345, 984015, 1377621, 2296035, 2952045, 4132863, 6888105, 20664315]

約数ペア:

[(1, 20664315), (3, 6888105), (5, 4132863), (7, 2952045), (9, 2296035), (15, 1377621), (21, 984015), (27, 765345), (35, 590409), (37, 558495), (45, 459207), (63, 328005), (81, 255115), (105, 196803), (111, 186165), (135, 153069), (185, 111699), (189, 109335), (197, 104895), (259, 79785), (315, 65601), (333, 62055), (405, 51023), (555, 37233), (567, 36445), (591, 34965), (777, 26595), (945, 21867), (985, 20979), (999, 20685), (1295, 15957), (1379, 14985), (1665, 12411), (1773, 11655), (2331, 8865), (2835, 7289), (2955, 6993), (2997, 6895), (3885, 5319), (4137, 4995)]