21789765

素因数分解:

$3^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1103}}^1$

素因数の和:1553

約数の個数: 24

約数和(自身を含む): 37889280

約数和(自身を除く): 16099515

約数列:

[1, 3, 5, 9, 15, 45, 439, 1103, 1317, 2195, 3309, 3951, 5515, 6585, 9927, 16545, 19755, 49635, 484217, 1452651, 2421085, 4357953, 7263255, 21789765]

約数ペア:

[(1, 21789765), (3, 7263255), (5, 4357953), (9, 2421085), (15, 1452651), (45, 484217), (439, 49635), (1103, 19755), (1317, 16545), (2195, 9927), (3309, 6585), (3951, 5515)]