18995809

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1\times {\mathrm{283}}^1$

素因数の和:556

約数の個数: 16

約数和(自身を含む): 22392832

約数和(自身を除く): 3397023

約数列:

[1, 7, 43, 223, 283, 301, 1561, 1981, 9589, 12169, 63109, 67123, 85183, 441763, 2713687, 18995809]

約数ペア:

[(1, 18995809), (7, 2713687), (43, 441763), (223, 85183), (283, 67123), (301, 63109), (1561, 12169), (1981, 9589)]