18890855

素因数分解:

$5^1\times {\mathrm{131}}^1\times {\mathrm{151}}^1\times {\mathrm{191}}^1$

素因数の和:478

約数の個数: 16

約数和(自身を含む): 23113728

約数和(自身を除く): 4222873

約数列:

[1, 5, 131, 151, 191, 655, 755, 955, 19781, 25021, 28841, 98905, 125105, 144205, 3778171, 18890855]

約数ペア:

[(1, 18890855), (5, 3778171), (131, 144205), (151, 125105), (191, 98905), (655, 28841), (755, 25021), (955, 19781)]