217428827

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{389}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 297704160

約数和(自身を除く): 80275333

約数列:

[1, 7, 11, 17, 49, 61, 77, 119, 187, 389, 427, 539, 671, 833, 1037, 1309, 2723, 2989, 4279, 4697, 6613, 7259, 9163, 11407, 19061, 23729, 29953, 32879, 46291, 50813, 72743, 79849, 166103, 209671, 261019, 324037, 403393, 509201, 558943, 1162721, 1827133, 2823751, 3564407, 4437323, 12789931, 19766257, 31061261, 217428827]

約数ペア:

[(1, 217428827), (7, 31061261), (11, 19766257), (17, 12789931), (49, 4437323), (61, 3564407), (77, 2823751), (119, 1827133), (187, 1162721), (389, 558943), (427, 509201), (539, 403393), (671, 324037), (833, 261019), (1037, 209671), (1309, 166103), (2723, 79849), (2989, 72743), (4279, 50813), (4697, 46291), (6613, 32879), (7259, 29953), (9163, 23729), (11407, 19061)]