21808220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155773}}^1$

素因数の和:155789

約数の個数: 24

約数和(自身を含む): 52340064

約数和(自身を除く): 30531844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155773, 311546, 623092, 778865, 1090411, 1557730, 2180822, 3115460, 4361644, 5452055, 10904110, 21808220]

約数ペア:

[(1, 21808220), (2, 10904110), (4, 5452055), (5, 4361644), (7, 3115460), (10, 2180822), (14, 1557730), (20, 1090411), (28, 778865), (35, 623092), (70, 311546), (140, 155773)]