81681999

素因数分解:

$3^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{9239}}^1$

素因数の和:9670

約数の個数: 16

約数和(自身を含む): 124776960

約数和(自身を除く): 43094961

約数列:

[1, 3, 7, 21, 421, 1263, 2947, 8841, 9239, 27717, 64673, 194019, 3889619, 11668857, 27227333, 81681999]

約数ペア:

[(1, 81681999), (3, 27227333), (7, 11668857), (21, 3889619), (421, 194019), (1263, 64673), (2947, 27717), (8841, 9239)]