20961459

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{8059}}^1$

素因数の和:8099

約数の個数: 18

約数和(自身を含む): 32167460

約数和(自身を除く): 11206001

約数列:

[1, 3, 9, 17, 51, 153, 289, 867, 2601, 8059, 24177, 72531, 137003, 411009, 1233027, 2329051, 6987153, 20961459]

約数ペア:

[(1, 20961459), (3, 6987153), (9, 2329051), (17, 1233027), (51, 411009), (153, 137003), (289, 72531), (867, 24177), (2601, 8059)]