19181721

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{2843}}^1$

素因数の和:3032

約数の個数: 16

約数和(自身を含む): 27711936

約数和(自身を除く): 8530215

約数列:

[1, 3, 13, 39, 173, 519, 2249, 2843, 6747, 8529, 36959, 110877, 491839, 1475517, 6393907, 19181721]

約数ペア:

[(1, 19181721), (3, 6393907), (13, 1475517), (39, 491839), (173, 110877), (519, 36959), (2249, 8529), (2843, 6747)]