20561912

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8539}}^1$

素因数の和:8595

約数の個数: 32

約数和(自身を含む): 45091200

約数和(自身を除く): 24529288

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 301, 344, 602, 1204, 2408, 8539, 17078, 34156, 59773, 68312, 119546, 239092, 367177, 478184, 734354, 1468708, 2570239, 2937416, 5140478, 10280956, 20561912]

約数ペア:

[(1, 20561912), (2, 10280956), (4, 5140478), (7, 2937416), (8, 2570239), (14, 1468708), (28, 734354), (43, 478184), (56, 367177), (86, 239092), (172, 119546), (301, 68312), (344, 59773), (602, 34156), (1204, 17078), (2408, 8539)]