19781974

素因数分解:

$2^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1\times {\mathrm{881}}^1$

素因数の和:1095

約数の個数: 16

約数和(自身を含む): 30270240

約数和(自身を除く): 10488266

約数列:

[1, 2, 103, 109, 206, 218, 881, 1762, 11227, 22454, 90743, 96029, 181486, 192058, 9890987, 19781974]

約数ペア:

[(1, 19781974), (2, 9890987), (103, 192058), (109, 181486), (206, 96029), (218, 90743), (881, 22454), (1762, 11227)]