18218975

素因数分解:

$5^2\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:299

約数の個数: 24

約数和(自身を含む): 23398800

約数和(自身を除く): 5179825

約数列:

[1, 5, 25, 67, 73, 149, 335, 365, 745, 1675, 1825, 3725, 4891, 9983, 10877, 24455, 49915, 54385, 122275, 249575, 271925, 728759, 3643795, 18218975]

約数ペア:

[(1, 18218975), (5, 3643795), (25, 728759), (67, 271925), (73, 249575), (149, 122275), (335, 54385), (365, 49915), (745, 24455), (1675, 10877), (1825, 9983), (3725, 4891)]