21042585

素因数分解:

$3^6\times 5^1\times {\mathrm{23}}^1\times {\mathrm{251}}^1$

素因数の和:297

約数の個数: 56

約数和(自身を含む): 39662784

約数和(自身を除く): 18620199

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 251, 345, 405, 621, 729, 753, 1035, 1215, 1255, 1863, 2259, 3105, 3645, 3765, 5589, 5773, 6777, 9315, 11295, 16767, 17319, 20331, 27945, 28865, 33885, 51957, 60993, 83835, 86595, 101655, 155871, 182979, 259785, 304965, 467613, 779355, 914895, 1402839, 2338065, 4208517, 7014195, 21042585]

約数ペア:

[(1, 21042585), (3, 7014195), (5, 4208517), (9, 2338065), (15, 1402839), (23, 914895), (27, 779355), (45, 467613), (69, 304965), (81, 259785), (115, 182979), (135, 155871), (207, 101655), (243, 86595), (251, 83835), (345, 60993), (405, 51957), (621, 33885), (729, 28865), (753, 27945), (1035, 20331), (1215, 17319), (1255, 16767), (1863, 11295), (2259, 9315), (3105, 6777), (3645, 5773), (3765, 5589)]