21090520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47933}}^1$

素因数の和:47955

約数の個数: 32

約数和(自身を含む): 51768720

約数和(自身を除く): 30678200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47933, 95866, 191732, 239665, 383464, 479330, 527263, 958660, 1054526, 1917320, 2109052, 2636315, 4218104, 5272630, 10545260, 21090520]

約数ペア:

[(1, 21090520), (2, 10545260), (4, 5272630), (5, 4218104), (8, 2636315), (10, 2109052), (11, 1917320), (20, 1054526), (22, 958660), (40, 527263), (44, 479330), (55, 383464), (88, 239665), (110, 191732), (220, 95866), (440, 47933)]