81538205

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19577}}^1$

素因数の和:19613

約数の個数: 24

約数和(自身を含む): 120522168

約数和(自身を除く): 38983963

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 595, 833, 4165, 19577, 97885, 137039, 332809, 685195, 959273, 1664045, 2329663, 4796365, 11648315, 16307641, 81538205]

約数ペア:

[(1, 81538205), (5, 16307641), (7, 11648315), (17, 4796365), (35, 2329663), (49, 1664045), (85, 959273), (119, 685195), (245, 332809), (595, 137039), (833, 97885), (4165, 19577)]