19905861

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 29842560

約数和(自身を除く): 9936699

約数列:

[1, 3, 17, 29, 43, 51, 87, 129, 313, 493, 731, 939, 1247, 1479, 2193, 3741, 5321, 9077, 13459, 15963, 21199, 27231, 40377, 63597, 154309, 228803, 390311, 462927, 686409, 1170933, 6635287, 19905861]

約数ペア:

[(1, 19905861), (3, 6635287), (17, 1170933), (29, 686409), (43, 462927), (51, 390311), (87, 228803), (129, 154309), (313, 63597), (493, 40377), (731, 27231), (939, 21199), (1247, 15963), (1479, 13459), (2193, 9077), (3741, 5321)]