21090124

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 42045696

約数和(自身を除く): 20955572

約数列:

[1, 2, 4, 11, 22, 43, 44, 71, 86, 142, 157, 172, 284, 314, 473, 628, 781, 946, 1562, 1727, 1892, 3053, 3124, 3454, 6106, 6751, 6908, 11147, 12212, 13502, 22294, 27004, 33583, 44588, 67166, 74261, 122617, 134332, 148522, 245234, 297044, 479321, 490468, 958642, 1917284, 5272531, 10545062, 21090124]

約数ペア:

[(1, 21090124), (2, 10545062), (4, 5272531), (11, 1917284), (22, 958642), (43, 490468), (44, 479321), (71, 297044), (86, 245234), (142, 148522), (157, 134332), (172, 122617), (284, 74261), (314, 67166), (473, 44588), (628, 33583), (781, 27004), (946, 22294), (1562, 13502), (1727, 12212), (1892, 11147), (3053, 6908), (3124, 6751), (3454, 6106)]