20997387

素因数分解:

$3^7\times {\mathrm{9601}}^1$

素因数の和:9622

約数の個数: 16

約数和(自身を含む): 31494560

約数和(自身を除く): 10497173

約数列:

[1, 3, 9, 27, 81, 243, 729, 2187, 9601, 28803, 86409, 259227, 777681, 2333043, 6999129, 20997387]

約数ペア:

[(1, 20997387), (3, 6999129), (9, 2333043), (27, 777681), (81, 259227), (243, 86409), (729, 28803), (2187, 9601)]