256979275

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 398776560

約数和(自身を除く): 141797285

約数列:

[1, 5, 7, 19, 25, 35, 49, 61, 95, 133, 175, 181, 245, 305, 427, 475, 665, 905, 931, 1159, 1225, 1267, 1525, 2135, 2989, 3325, 3439, 4525, 4655, 5795, 6335, 8113, 8869, 10675, 11041, 14945, 17195, 23275, 24073, 28975, 31675, 40565, 44345, 55205, 56791, 74725, 77287, 85975, 120365, 168511, 202825, 209779, 221725, 276025, 283955, 386435, 541009, 601825, 842555, 1048895, 1419775, 1468453, 1932175, 2705045, 4212775, 5244475, 7342265, 10279171, 13525225, 36711325, 51395855, 256979275]

約数ペア:

[(1, 256979275), (5, 51395855), (7, 36711325), (19, 13525225), (25, 10279171), (35, 7342265), (49, 5244475), (61, 4212775), (95, 2705045), (133, 1932175), (175, 1468453), (181, 1419775), (245, 1048895), (305, 842555), (427, 601825), (475, 541009), (665, 386435), (905, 283955), (931, 276025), (1159, 221725), (1225, 209779), (1267, 202825), (1525, 168511), (2135, 120365), (2989, 85975), (3325, 77287), (3439, 74725), (4525, 56791), (4655, 55205), (5795, 44345), (6335, 40565), (8113, 31675), (8869, 28975), (10675, 24073), (11041, 23275), (14945, 17195)]