19978371

素因数分解:

$3^2\times 7^1\times {\mathrm{337}}^1\times {\mathrm{941}}^1$

素因数の和:1291

約数の個数: 24

約数和(自身を含む): 33113184

約数和(自身を除く): 13134813

約数列:

[1, 3, 7, 9, 21, 63, 337, 941, 1011, 2359, 2823, 3033, 6587, 7077, 8469, 19761, 21231, 59283, 317117, 951351, 2219819, 2854053, 6659457, 19978371]

約数ペア:

[(1, 19978371), (3, 6659457), (7, 2854053), (9, 2219819), (21, 951351), (63, 317117), (337, 59283), (941, 21231), (1011, 19761), (2359, 8469), (2823, 7077), (3033, 6587)]