21491800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{9769}}^1$

素因数の和:9796

約数の個数: 48

約数和(自身を含む): 54516600

約数和(自身を除く): 33024800

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, 9769, 19538, 39076, 48845, 78152, 97690, 107459, 195380, 214918, 244225, 390760, 429836, 488450, 537295, 859672, 976900, 1074590, 1953800, 2149180, 2686475, 4298360, 5372950, 10745900, 21491800]

約数ペア:

[(1, 21491800), (2, 10745900), (4, 5372950), (5, 4298360), (8, 2686475), (10, 2149180), (11, 1953800), (20, 1074590), (22, 976900), (25, 859672), (40, 537295), (44, 488450), (50, 429836), (55, 390760), (88, 244225), (100, 214918), (110, 195380), (200, 107459), (220, 97690), (275, 78152), (440, 48845), (550, 39076), (1100, 19538), (2200, 9769)]