18879890

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{17321}}^1$

素因数の和:17437

約数の個数: 16

約数和(自身を含む): 34297560

約数和(自身を除く): 15417670

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 17321, 34642, 86605, 173210, 1887989, 3775978, 9439945, 18879890]

約数ペア:

[(1, 18879890), (2, 9439945), (5, 3775978), (10, 1887989), (109, 173210), (218, 86605), (545, 34642), (1090, 17321)]