19791981

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{6449}}^1$

素因数の和:6497

約数の個数: 24

約数和(自身を含む): 32198400

約数和(自身を除く): 12406419

約数列:

[1, 3, 9, 11, 31, 33, 93, 99, 279, 341, 1023, 3069, 6449, 19347, 58041, 70939, 199919, 212817, 599757, 638451, 1799271, 2199109, 6597327, 19791981]

約数ペア:

[(1, 19791981), (3, 6597327), (9, 2199109), (11, 1799271), (31, 638451), (33, 599757), (93, 212817), (99, 199919), (279, 70939), (341, 58041), (1023, 19347), (3069, 6449)]