19805135

素因数分解:

$5^1\times 7^1\times {\mathrm{571}}^1\times {\mathrm{991}}^1$

素因数の和:1574

約数の個数: 16

約数和(自身を含む): 27236352

約数和(自身を除く): 7431217

約数列:

[1, 5, 7, 35, 571, 991, 2855, 3997, 4955, 6937, 19985, 34685, 565861, 2829305, 3961027, 19805135]

約数ペア:

[(1, 19805135), (5, 3961027), (7, 2829305), (35, 565861), (571, 34685), (991, 19985), (2855, 6937), (3997, 4955)]