20431325

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{643}}^1$

素因数の和:725

約数の個数: 24

約数和(自身を含む): 26831616

約数和(自身を除く): 6400291

約数列:

[1, 5, 25, 31, 41, 155, 205, 643, 775, 1025, 1271, 3215, 6355, 16075, 19933, 26363, 31775, 99665, 131815, 498325, 659075, 817253, 4086265, 20431325]

約数ペア:

[(1, 20431325), (5, 4086265), (25, 817253), (31, 659075), (41, 498325), (155, 131815), (205, 99665), (643, 31775), (775, 26363), (1025, 19933), (1271, 16075), (3215, 6355)]