20981534

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{28277}}^1$

素因数の和:28339

約数の個数: 16

約数和(自身を含む): 36648288

約数和(自身を除く): 15666754

約数列:

[1, 2, 7, 14, 53, 106, 371, 742, 28277, 56554, 197939, 395878, 1498681, 2997362, 10490767, 20981534]

約数ペア:

[(1, 20981534), (2, 10490767), (7, 2997362), (14, 1498681), (53, 395878), (106, 197939), (371, 56554), (742, 28277)]