21440980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97459}}^1$

素因数の和:97479

約数の個数: 24

約数和(自身を含む): 49119840

約数和(自身を除く): 27678860

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97459, 194918, 389836, 487295, 974590, 1072049, 1949180, 2144098, 4288196, 5360245, 10720490, 21440980]

約数ペア:

[(1, 21440980), (2, 10720490), (4, 5360245), (5, 4288196), (10, 2144098), (11, 1949180), (20, 1072049), (22, 974590), (44, 487295), (55, 389836), (110, 194918), (220, 97459)]