21878571

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{3923}}^1$

素因数の和:3963

約数の個数: 24

約数和(自身を含む): 34468416

約数和(自身を除く): 12589845

約数列:

[1, 3, 11, 13, 33, 39, 143, 169, 429, 507, 1859, 3923, 5577, 11769, 43153, 50999, 129459, 152997, 560989, 662987, 1682967, 1988961, 7292857, 21878571]

約数ペア:

[(1, 21878571), (3, 7292857), (11, 1988961), (13, 1682967), (33, 662987), (39, 560989), (143, 152997), (169, 129459), (429, 50999), (507, 43153), (1859, 11769), (3923, 5577)]