20956780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80603}}^1$

素因数の和:80625

約数の個数: 24

約数和(自身を含む): 47395152

約数和(自身を除く): 26438372

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80603, 161206, 322412, 403015, 806030, 1047839, 1612060, 2095678, 4191356, 5239195, 10478390, 20956780]

約数ペア:

[(1, 20956780), (2, 10478390), (4, 5239195), (5, 4191356), (10, 2095678), (13, 1612060), (20, 1047839), (26, 806030), (52, 403015), (65, 322412), (130, 161206), (260, 80603)]