399047999

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{15787}}^1$

素因数の和:15974

約数の個数: 16

約数和(自身を含む): 478944768

約数和(自身を除く): 79896769

約数列:

[1, 7, 23, 157, 161, 1099, 3611, 15787, 25277, 110509, 363101, 2478559, 2541707, 17349913, 57006857, 399047999]

約数ペア:

[(1, 399047999), (7, 57006857), (23, 17349913), (157, 2541707), (161, 2478559), (1099, 363101), (3611, 110509), (15787, 25277)]