21997611

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{653}}^1$

素因数の和:875

約数の個数: 24

約数和(自身を含む): 33667920

約数和(自身を除く): 11670309

約数列:

[1, 3, 9, 19, 57, 171, 197, 591, 653, 1773, 1959, 3743, 5877, 11229, 12407, 33687, 37221, 111663, 128641, 385923, 1157769, 2444179, 7332537, 21997611]

約数ペア:

[(1, 21997611), (3, 7332537), (9, 2444179), (19, 1157769), (57, 385923), (171, 128641), (197, 111663), (591, 37221), (653, 33687), (1773, 12407), (1959, 11229), (3743, 5877)]