21573280

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1237}}^1$

素因数の和:1361

約数の個数: 48

約数和(自身を含む): 51476040

約数和(自身を除く): 29902760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1237, 1744, 2180, 2474, 3488, 4360, 4948, 6185, 8720, 9896, 12370, 17440, 19792, 24740, 39584, 49480, 98960, 134833, 197920, 269666, 539332, 674165, 1078664, 1348330, 2157328, 2696660, 4314656, 5393320, 10786640, 21573280]

約数ペア:

[(1, 21573280), (2, 10786640), (4, 5393320), (5, 4314656), (8, 2696660), (10, 2157328), (16, 1348330), (20, 1078664), (32, 674165), (40, 539332), (80, 269666), (109, 197920), (160, 134833), (218, 98960), (436, 49480), (545, 39584), (872, 24740), (1090, 19792), (1237, 17440), (1744, 12370), (2180, 9896), (2474, 8720), (3488, 6185), (4360, 4948)]