20676981

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{2399}}^1$

素因数の和:2445

約数の個数: 24

約数和(自身を含む): 31622400

約数和(自身を除く): 10945419

約数列:

[1, 3, 13, 17, 39, 51, 169, 221, 507, 663, 2399, 2873, 7197, 8619, 31187, 40783, 93561, 122349, 405431, 530179, 1216293, 1590537, 6892327, 20676981]

約数ペア:

[(1, 20676981), (3, 6892327), (13, 1590537), (17, 1216293), (39, 530179), (51, 405431), (169, 122349), (221, 93561), (507, 40783), (663, 31187), (2399, 8619), (2873, 7197)]