21813875

素因数分解:

$5^3\times {\mathrm{47}}^2\times {\mathrm{79}}^1$

素因数の和:188

約数の個数: 24

約数和(自身を含む): 28167360

約数和(自身を除く): 6353485

約数列:

[1, 5, 25, 47, 79, 125, 235, 395, 1175, 1975, 2209, 3713, 5875, 9875, 11045, 18565, 55225, 92825, 174511, 276125, 464125, 872555, 4362775, 21813875]

約数ペア:

[(1, 21813875), (5, 4362775), (25, 872555), (47, 464125), (79, 276125), (125, 174511), (235, 92825), (395, 55225), (1175, 18565), (1975, 11045), (2209, 9875), (3713, 5875)]