21280525

素因数分解:

$5^2\times 7^1\times {\mathrm{277}}^1\times {\mathrm{439}}^1$

素因数の和:733

約数の個数: 24

約数和(自身を含む): 30335360

約数和(自身を除く): 9054835

約数列:

[1, 5, 7, 25, 35, 175, 277, 439, 1385, 1939, 2195, 3073, 6925, 9695, 10975, 15365, 48475, 76825, 121603, 608015, 851221, 3040075, 4256105, 21280525]

約数ペア:

[(1, 21280525), (5, 4256105), (7, 3040075), (25, 851221), (35, 608015), (175, 121603), (277, 76825), (439, 48475), (1385, 15365), (1939, 10975), (2195, 9695), (3073, 6925)]