21000751900

素因数分解:

$2^2\times 5^2\times {\mathrm{571}}^1\times {\mathrm{367789}}^1$

素因数の和:368374

約数の個数: 36

約数和(自身を含む): 45651565960

約数和(自身を除く): 24650814060

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 571, 1142, 2284, 2855, 5710, 11420, 14275, 28550, 57100, 367789, 735578, 1471156, 1838945, 3677890, 7355780, 9194725, 18389450, 36778900, 210007519, 420015038, 840030076, 1050037595, 2100075190, 4200150380, 5250187975, 10500375950, 21000751900]

約数ペア:

[(1, 21000751900), (2, 10500375950), (4, 5250187975), (5, 4200150380), (10, 2100075190), (20, 1050037595), (25, 840030076), (50, 420015038), (100, 210007519), (571, 36778900), (1142, 18389450), (2284, 9194725), (2855, 7355780), (5710, 3677890), (11420, 1838945), (14275, 1471156), (28550, 735578), (57100, 367789)]