21397790

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:476

約数の個数: 32

約数和(自身を含む): 39584160

約数和(自身を除く): 18186370

約数列:

[1, 2, 5, 10, 67, 109, 134, 218, 293, 335, 545, 586, 670, 1090, 1465, 2930, 7303, 14606, 19631, 31937, 36515, 39262, 63874, 73030, 98155, 159685, 196310, 319370, 2139779, 4279558, 10698895, 21397790]

約数ペア:

[(1, 21397790), (2, 10698895), (5, 4279558), (10, 2139779), (67, 319370), (109, 196310), (134, 159685), (218, 98155), (293, 73030), (335, 63874), (545, 39262), (586, 36515), (670, 31937), (1090, 19631), (1465, 14606), (2930, 7303)]