20689510

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{7159}}^1$

素因数の和:7200

約数の個数: 24

約数和(自身を含む): 39566160

約数和(自身を除く): 18876650

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 289, 578, 1445, 2890, 7159, 14318, 35795, 71590, 121703, 243406, 608515, 1217030, 2068951, 4137902, 10344755, 20689510]

約数ペア:

[(1, 20689510), (2, 10344755), (5, 4137902), (10, 2068951), (17, 1217030), (34, 608515), (85, 243406), (170, 121703), (289, 71590), (578, 35795), (1445, 14318), (2890, 7159)]