19810895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{4549}}^1$

素因数の和:4634

約数の個数: 16

約数和(自身を含む): 25989600

約数和(自身を除く): 6178705

約数列:

[1, 5, 13, 65, 67, 335, 871, 4355, 4549, 22745, 59137, 295685, 304783, 1523915, 3962179, 19810895]

約数ペア:

[(1, 19810895), (5, 3962179), (13, 1523915), (65, 304783), (67, 295685), (335, 59137), (871, 22745), (4355, 4549)]