20815845

素因数分解:

$3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{8839}}^1$

素因数の和:9004

約数の個数: 16

約数和(自身を含む): 33521280

約数和(自身を除く): 12705435

約数列:

[1, 3, 5, 15, 157, 471, 785, 2355, 8839, 26517, 44195, 132585, 1387723, 4163169, 6938615, 20815845]

約数ペア:

[(1, 20815845), (3, 6938615), (5, 4163169), (15, 1387723), (157, 132585), (471, 44195), (785, 26517), (2355, 8839)]