28009791

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2879}}^1$

素因数の和:2955

約数の個数: 24

約数和(自身を含む): 43130880

約数和(自身を除く): 15121089

約数列:

[1, 3, 9, 23, 47, 69, 141, 207, 423, 1081, 2879, 3243, 8637, 9729, 25911, 66217, 135313, 198651, 405939, 595953, 1217817, 3112199, 9336597, 28009791]

約数ペア:

[(1, 28009791), (3, 9336597), (9, 3112199), (23, 1217817), (47, 595953), (69, 405939), (141, 198651), (207, 135313), (423, 66217), (1081, 25911), (2879, 9729), (3243, 8637)]