20788900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{18899}}^1$

素因数の和:18924

約数の個数: 36

約数和(自身を含む): 49215600

約数和(自身を除く): 28426700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100, 18899, 37798, 75596, 94495, 188990, 207889, 377980, 415778, 472475, 831556, 944950, 1039445, 1889900, 2078890, 4157780, 5197225, 10394450, 20788900]

約数ペア:

[(1, 20788900), (2, 10394450), (4, 5197225), (5, 4157780), (10, 2078890), (11, 1889900), (20, 1039445), (22, 944950), (25, 831556), (44, 472475), (50, 415778), (55, 377980), (100, 207889), (110, 188990), (220, 94495), (275, 75596), (550, 37798), (1100, 18899)]