20587221

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{563}}^1$

素因数の和:825

約数の個数: 24

約数和(自身を含む): 31674240

約数和(自身を除く): 11087019

約数列:

[1, 3, 9, 17, 51, 153, 239, 563, 717, 1689, 2151, 4063, 5067, 9571, 12189, 28713, 36567, 86139, 134557, 403671, 1211013, 2287469, 6862407, 20587221]

約数ペア:

[(1, 20587221), (3, 6862407), (9, 2287469), (17, 1211013), (51, 403671), (153, 134557), (239, 86139), (563, 36567), (717, 28713), (1689, 12189), (2151, 9571), (4063, 5067)]