21171490

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{29819}}^1$

素因数の和:29897

約数の個数: 16

約数和(自身を含む): 38646720

約数和(自身を除く): 17475230

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 29819, 59638, 149095, 298190, 2117149, 4234298, 10585745, 21171490]

約数ペア:

[(1, 21171490), (2, 10585745), (5, 4234298), (10, 2117149), (71, 298190), (142, 149095), (355, 59638), (710, 29819)]