18939800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{8609}}^1$

素因数の和:8636

約数の個数: 48

約数和(自身を含む): 48043800

約数和(自身を除く): 29104000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100, 2200, 8609, 17218, 34436, 43045, 68872, 86090, 94699, 172180, 189398, 215225, 344360, 378796, 430450, 473495, 757592, 860900, 946990, 1721800, 1893980, 2367475, 3787960, 4734950, 9469900, 18939800]

約数ペア:

[(1, 18939800), (2, 9469900), (4, 4734950), (5, 3787960), (8, 2367475), (10, 1893980), (11, 1721800), (20, 946990), (22, 860900), (25, 757592), (40, 473495), (44, 430450), (50, 378796), (55, 344360), (88, 215225), (100, 189398), (110, 172180), (200, 94699), (220, 86090), (275, 68872), (440, 43045), (550, 34436), (1100, 17218), (2200, 8609)]