20291090

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28579}}^1$

素因数の和:28657

約数の個数: 16

約数和(自身を含む): 37039680

約数和(自身を除く): 16748590

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 28579, 57158, 142895, 285790, 2029109, 4058218, 10145545, 20291090]

約数ペア:

[(1, 20291090), (2, 10145545), (5, 4058218), (10, 2029109), (71, 285790), (142, 142895), (355, 57158), (710, 28579)]