19937151

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{719}}^1$

素因数の和:820

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 12318849

約数列:

[1, 3, 9, 13, 27, 39, 79, 117, 237, 351, 711, 719, 1027, 2133, 2157, 3081, 6471, 9243, 9347, 19413, 27729, 28041, 56801, 84123, 170403, 252369, 511209, 738413, 1533627, 2215239, 6645717, 19937151]

約数ペア:

[(1, 19937151), (3, 6645717), (9, 2215239), (13, 1533627), (27, 738413), (39, 511209), (79, 252369), (117, 170403), (237, 84123), (351, 56801), (711, 28041), (719, 27729), (1027, 19413), (2133, 9347), (2157, 9243), (3081, 6471)]