239040440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{138977}}^1$

素因数の和:139031

約数の個数: 32

約数和(自身を含む): 550352880

約数和(自身を除く): 311312440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 138977, 277954, 555908, 694885, 1111816, 1389770, 2779540, 5559080, 5976011, 11952022, 23904044, 29880055, 47808088, 59760110, 119520220, 239040440]

約数ペア:

[(1, 239040440), (2, 119520220), (4, 59760110), (5, 47808088), (8, 29880055), (10, 23904044), (20, 11952022), (40, 5976011), (43, 5559080), (86, 2779540), (172, 1389770), (215, 1111816), (344, 694885), (430, 555908), (860, 277954), (1720, 138977)]