19780971

素因数分解:

$3^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{2699}}^1$

素因数の和:3058

約数の個数: 16

約数和(自身を含む): 30240000

約数和(自身を除く): 10459029

約数列:

[1, 3, 7, 21, 349, 1047, 2443, 2699, 7329, 8097, 18893, 56679, 941951, 2825853, 6593657, 19780971]

約数ペア:

[(1, 19780971), (3, 6593657), (7, 2825853), (21, 941951), (349, 56679), (1047, 18893), (2443, 8097), (2699, 7329)]