20656377

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2143}}^1$

素因数の和:2179

約数の個数: 40

約数和(自身を含む): 37357056

約数和(自身を除く): 16700679

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2143, 3213, 6429, 9639, 15001, 19287, 36431, 45003, 57861, 109293, 135009, 173583, 255017, 327879, 405027, 765051, 983637, 1215081, 2295153, 2950911, 6885459, 20656377]

約数ペア:

[(1, 20656377), (3, 6885459), (7, 2950911), (9, 2295153), (17, 1215081), (21, 983637), (27, 765051), (51, 405027), (63, 327879), (81, 255017), (119, 173583), (153, 135009), (189, 109293), (357, 57861), (459, 45003), (567, 36431), (1071, 19287), (1377, 15001), (2143, 9639), (3213, 6429)]