21507987

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1\times {\mathrm{601}}^1$

素因数の和:834

約数の個数: 16

約数和(自身を含む): 29281280

約数和(自身を除く): 7773293

約数列:

[1, 3, 79, 151, 237, 453, 601, 1803, 11929, 35787, 47479, 90751, 142437, 272253, 7169329, 21507987]

約数ペア:

[(1, 21507987), (3, 7169329), (79, 272253), (151, 142437), (237, 90751), (453, 47479), (601, 35787), (1803, 11929)]