199980025

素因数分解:

$5^2\times 7^2\times {\mathrm{163249}}^1$

素因数の和:163273

約数の個数: 18

約数和(自身を含む): 288462750

約数和(自身を除く): 88482725

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 163249, 816245, 1142743, 4081225, 5713715, 7999201, 28568575, 39996005, 199980025]

約数ペア:

[(1, 199980025), (5, 39996005), (7, 28568575), (25, 7999201), (35, 5713715), (49, 4081225), (175, 1142743), (245, 816245), (1225, 163249)]