21142185

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 34826880

約数和(自身を除く): 13684695

約数列:

[1, 3, 5, 15, 67, 109, 193, 201, 327, 335, 545, 579, 965, 1005, 1635, 2895, 7303, 12931, 21037, 21909, 36515, 38793, 63111, 64655, 105185, 109545, 193965, 315555, 1409479, 4228437, 7047395, 21142185]

約数ペア:

[(1, 21142185), (3, 7047395), (5, 4228437), (15, 1409479), (67, 315555), (109, 193965), (193, 109545), (201, 105185), (327, 64655), (335, 63111), (545, 38793), (579, 36515), (965, 21909), (1005, 21037), (1635, 12931), (2895, 7303)]