20868945

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{81839}}^1$

素因数の和:81864

約数の個数: 16

約数和(自身を含む): 35354880

約数和(自身を除く): 14485935

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 81839, 245517, 409195, 1227585, 1391263, 4173789, 6956315, 20868945]

約数ペア:

[(1, 20868945), (3, 6956315), (5, 4173789), (15, 1391263), (17, 1227585), (51, 409195), (85, 245517), (255, 81839)]