19771645

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{641}}^1$

素因数の和:876

約数の個数: 16

約数和(自身を含む): 24652800

約数和(自身を除く): 4881155

約数列:

[1, 5, 31, 155, 199, 641, 995, 3205, 6169, 19871, 30845, 99355, 127559, 637795, 3954329, 19771645]

約数ペア:

[(1, 19771645), (5, 3954329), (31, 637795), (155, 127559), (199, 99355), (641, 30845), (995, 19871), (3205, 6169)]