21722170

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5417}}^1$

素因数の和:5825

約数の個数: 16

約数和(自身を含む): 39204648

約数和(自身を除く): 17482478

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5417, 10834, 27085, 54170, 2172217, 4344434, 10861085, 21722170]

約数ペア:

[(1, 21722170), (2, 10861085), (5, 4344434), (10, 2172217), (401, 54170), (802, 27085), (2005, 10834), (4010, 5417)]