16981905

素因数分解:

$3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{7211}}^1$

素因数の和:7376

約数の個数: 16

約数和(自身を含む): 27347904

約数和(自身を除く): 10365999

約数列:

[1, 3, 5, 15, 157, 471, 785, 2355, 7211, 21633, 36055, 108165, 1132127, 3396381, 5660635, 16981905]

約数ペア:

[(1, 16981905), (3, 5660635), (5, 3396381), (15, 1132127), (157, 108165), (471, 36055), (785, 21633), (2355, 7211)]