21755811

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1777}}^1$

素因数の和:1851

約数の個数: 32

約数和(自身を含む): 36868608

約数和(自身を除く): 15112797

約数列:

[1, 3, 7, 11, 21, 33, 53, 77, 159, 231, 371, 583, 1113, 1749, 1777, 4081, 5331, 12243, 12439, 19547, 37317, 58641, 94181, 136829, 282543, 410487, 659267, 1035991, 1977801, 3107973, 7251937, 21755811]

約数ペア:

[(1, 21755811), (3, 7251937), (7, 3107973), (11, 1977801), (21, 1035991), (33, 659267), (53, 410487), (77, 282543), (159, 136829), (231, 94181), (371, 58641), (583, 37317), (1113, 19547), (1749, 12439), (1777, 12243), (4081, 5331)]