19892999

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{787}}^1$

素因数の和:974

約数の個数: 16

約数和(自身を含む): 23904768

約数和(自身を除く): 4011769

約数列:

[1, 7, 23, 157, 161, 787, 1099, 3611, 5509, 18101, 25277, 123559, 126707, 864913, 2841857, 19892999]

約数ペア:

[(1, 19892999), (7, 2841857), (23, 864913), (157, 126707), (161, 123559), (787, 25277), (1099, 18101), (3611, 5509)]