19980981

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{173}}^1\times {\mathrm{313}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 29831256

約数和(自身を除く): 9850275

約数列:

[1, 3, 9, 41, 123, 173, 313, 369, 519, 939, 1557, 2817, 7093, 12833, 21279, 38499, 54149, 63837, 115497, 162447, 487341, 2220109, 6660327, 19980981]

約数ペア:

[(1, 19980981), (3, 6660327), (9, 2220109), (41, 487341), (123, 162447), (173, 115497), (313, 63837), (369, 54149), (519, 38499), (939, 21279), (1557, 12833), (2817, 7093)]