19978942

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{4079}}^1$

素因数の和:4191

約数の個数: 16

約数和(自身を含む): 31334400

約数和(自身を除く): 11355458

約数列:

[1, 2, 31, 62, 79, 158, 2449, 4079, 4898, 8158, 126449, 252898, 322241, 644482, 9989471, 19978942]

約数ペア:

[(1, 19978942), (2, 9989471), (31, 644482), (62, 322241), (79, 252898), (158, 126449), (2449, 8158), (4079, 4898)]