18681875

素因数分解:

$5^4\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:512

約数の個数: 20

約数和(自身を含む): 23729904

約数和(自身を除く): 5048029

約数列:

[1, 5, 25, 71, 125, 355, 421, 625, 1775, 2105, 8875, 10525, 29891, 44375, 52625, 149455, 263125, 747275, 3736375, 18681875]

約数ペア:

[(1, 18681875), (5, 3736375), (25, 747275), (71, 263125), (125, 149455), (355, 52625), (421, 44375), (625, 29891), (1775, 10525), (2105, 8875)]