21061025

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{439}}^1$

素因数の和:569

約数の個数: 24

約数和(自身を含む): 27825600

約数和(自身を除く): 6764575

約数列:

[1, 5, 19, 25, 95, 101, 439, 475, 505, 1919, 2195, 2525, 8341, 9595, 10975, 41705, 44339, 47975, 208525, 221695, 842441, 1108475, 4212205, 21061025]

約数ペア:

[(1, 21061025), (5, 4212205), (19, 1108475), (25, 842441), (95, 221695), (101, 208525), (439, 47975), (475, 44339), (505, 41705), (1919, 10975), (2195, 9595), (2525, 8341)]