1991353

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{277}}^1$

素因数の和:376

約数の個数: 16

約数和(自身を含む): 2490880

約数和(自身を除く): 499527

約数列:

[1, 7, 13, 79, 91, 277, 553, 1027, 1939, 3601, 7189, 21883, 25207, 153181, 284479, 1991353]

約数ペア:

[(1, 1991353), (7, 284479), (13, 153181), (79, 25207), (91, 21883), (277, 7189), (553, 3601), (1027, 1939)]