21553180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{313}}^2$

素因数の和:646

約数の個数: 36

約数和(自身を含む): 49534632

約数和(自身を除く): 27981452

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 313, 626, 1252, 1565, 3130, 3443, 6260, 6886, 13772, 17215, 34430, 68860, 97969, 195938, 391876, 489845, 979690, 1077659, 1959380, 2155318, 4310636, 5388295, 10776590, 21553180]

約数ペア:

[(1, 21553180), (2, 10776590), (4, 5388295), (5, 4310636), (10, 2155318), (11, 1959380), (20, 1077659), (22, 979690), (44, 489845), (55, 391876), (110, 195938), (220, 97969), (313, 68860), (626, 34430), (1252, 17215), (1565, 13772), (3130, 6886), (3443, 6260)]