20185605

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:248

約数の個数: 80

約数和(自身を含む): 41399424

約数和(自身を除く): 21213819

約数列:

[1, 3, 5, 9, 11, 15, 23, 27, 33, 45, 55, 69, 81, 99, 115, 135, 165, 197, 207, 253, 297, 345, 405, 495, 591, 621, 759, 891, 985, 1035, 1265, 1485, 1773, 1863, 2167, 2277, 2955, 3105, 3795, 4455, 4531, 5319, 6501, 6831, 8865, 9315, 10835, 11385, 13593, 15957, 19503, 20493, 22655, 26595, 32505, 34155, 40779, 49841, 58509, 67965, 79785, 97515, 102465, 122337, 149523, 175527, 203895, 249205, 292545, 367011, 448569, 611685, 747615, 877635, 1345707, 1835055, 2242845, 4037121, 6728535, 20185605]

約数ペア:

[(1, 20185605), (3, 6728535), (5, 4037121), (9, 2242845), (11, 1835055), (15, 1345707), (23, 877635), (27, 747615), (33, 611685), (45, 448569), (55, 367011), (69, 292545), (81, 249205), (99, 203895), (115, 175527), (135, 149523), (165, 122337), (197, 102465), (207, 97515), (253, 79785), (297, 67965), (345, 58509), (405, 49841), (495, 40779), (591, 34155), (621, 32505), (759, 26595), (891, 22655), (985, 20493), (1035, 19503), (1265, 15957), (1485, 13593), (1773, 11385), (1863, 10835), (2167, 9315), (2277, 8865), (2955, 6831), (3105, 6501), (3795, 5319), (4455, 4531)]