209578431

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1\times {\mathrm{421}}^1$

素因数の和:711

約数の個数: 32

約数和(自身を含む): 304812288

約数和(自身を除く): 95233857

約数列:

[1, 3, 17, 43, 51, 129, 227, 421, 681, 731, 1263, 2193, 3859, 7157, 9761, 11577, 18103, 21471, 29283, 54309, 95567, 165937, 286701, 307751, 497811, 923253, 1624639, 4109381, 4873917, 12328143, 69859477, 209578431]

約数ペア:

[(1, 209578431), (3, 69859477), (17, 12328143), (43, 4873917), (51, 4109381), (129, 1624639), (227, 923253), (421, 497811), (681, 307751), (731, 286701), (1263, 165937), (2193, 95567), (3859, 54309), (7157, 29283), (9761, 21471), (11577, 18103)]