21603875

素因数分解:

$5^3\times {\mathrm{401}}^1\times {\mathrm{431}}^1$

素因数の和:847

約数の個数: 16

約数和(自身を含む): 27091584

約数和(自身を除く): 5487709

約数列:

[1, 5, 25, 125, 401, 431, 2005, 2155, 10025, 10775, 50125, 53875, 172831, 864155, 4320775, 21603875]

約数ペア:

[(1, 21603875), (5, 4320775), (25, 864155), (125, 172831), (401, 53875), (431, 50125), (2005, 10775), (2155, 10025)]