18381985

素因数分解:

$5^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1\times {\mathrm{251}}^1$

素因数の和:504

約数の個数: 16

約数和(自身を含む): 22522752

約数和(自身を除く): 4140767

約数列:

[1, 5, 97, 151, 251, 485, 755, 1255, 14647, 24347, 37901, 73235, 121735, 189505, 3676397, 18381985]

約数ペア:

[(1, 18381985), (5, 3676397), (97, 189505), (151, 121735), (251, 73235), (485, 37901), (755, 24347), (1255, 14647)]