21124285

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2731}}^1$

素因数の和:2773

約数の個数: 32

約数和(自身を含む): 33046272

約数和(自身を除く): 11921987

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2731, 7735, 13655, 19117, 35503, 46427, 95585, 177515, 232135, 248521, 324989, 603551, 1242605, 1624945, 3017755, 4224857, 21124285]

約数ペア:

[(1, 21124285), (5, 4224857), (7, 3017755), (13, 1624945), (17, 1242605), (35, 603551), (65, 324989), (85, 248521), (91, 232135), (119, 177515), (221, 95585), (455, 46427), (595, 35503), (1105, 19117), (1547, 13655), (2731, 7735)]