19729855

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1\times {\mathrm{251}}^1$

素因数の和:534

約数の個数: 16

約数和(自身を含む): 24192000

約数和(自身を除く): 4462145

約数列:

[1, 5, 79, 199, 251, 395, 995, 1255, 15721, 19829, 49949, 78605, 99145, 249745, 3945971, 19729855]

約数ペア:

[(1, 19729855), (5, 3945971), (79, 249745), (199, 99145), (251, 78605), (395, 49949), (995, 19829), (1255, 15721)]