20581995

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{929}}^1$

素因数の和:1155

約数の個数: 32

約数和(自身を含む): 37854720

約数和(自身を除く): 17272725

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 211, 633, 929, 1055, 1477, 2787, 3165, 4431, 4645, 6503, 7385, 13935, 19509, 22155, 32515, 97545, 196019, 588057, 980095, 1372133, 2940285, 4116399, 6860665, 20581995]

約数ペア:

[(1, 20581995), (3, 6860665), (5, 4116399), (7, 2940285), (15, 1372133), (21, 980095), (35, 588057), (105, 196019), (211, 97545), (633, 32515), (929, 22155), (1055, 19509), (1477, 13935), (2787, 7385), (3165, 6503), (4431, 4645)]