21531475

素因数分解:

$5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2017}}^1$

素因数の和:2095

約数の個数: 24

約数和(自身を含む): 31028768

約数和(自身を除く): 9497293

約数列:

[1, 5, 7, 25, 35, 61, 175, 305, 427, 1525, 2017, 2135, 10085, 10675, 14119, 50425, 70595, 123037, 352975, 615185, 861259, 3075925, 4306295, 21531475]

約数ペア:

[(1, 21531475), (5, 4306295), (7, 3075925), (25, 861259), (35, 615185), (61, 352975), (175, 123037), (305, 70595), (427, 50425), (1525, 14119), (2017, 10675), (2135, 10085)]