19460720

素因数分解:

$2^4\times 5^1\times {\mathrm{243259}}^1$

素因数の和:243272

約数の個数: 20

約数和(自身を含む): 45246360

約数和(自身を除く): 25785640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243259, 486518, 973036, 1216295, 1946072, 2432590, 3892144, 4865180, 9730360, 19460720]

約数ペア:

[(1, 19460720), (2, 9730360), (4, 4865180), (5, 3892144), (8, 2432590), (10, 1946072), (16, 1216295), (20, 973036), (40, 486518), (80, 243259)]