21000688780

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{7047211}}^1$

素因数の和:7047369

約数の個数: 24

約数和(自身を含む): 44397435600

約数和(自身を除く): 23396746820

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 7047211, 14094422, 28188844, 35236055, 70472110, 140944220, 1050034439, 2100068878, 4200137756, 5250172195, 10500344390, 21000688780]

約数ペア:

[(1, 21000688780), (2, 10500344390), (4, 5250172195), (5, 4200137756), (10, 2100068878), (20, 1050034439), (149, 140944220), (298, 70472110), (596, 35236055), (745, 28188844), (1490, 14094422), (2980, 7047211)]