81699380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{20123}}^1$

素因数の和:20168

約数の個数: 48

約数和(自身を含む): 202849920

約数和(自身を除く): 121150540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 20123, 40246, 80492, 100615, 140861, 201230, 281722, 402460, 563444, 583567, 704305, 1167134, 1408610, 2334268, 2817220, 2917835, 4084969, 5835670, 8169938, 11671340, 16339876, 20424845, 40849690, 81699380]

約数ペア:

[(1, 81699380), (2, 40849690), (4, 20424845), (5, 16339876), (7, 11671340), (10, 8169938), (14, 5835670), (20, 4084969), (28, 2917835), (29, 2817220), (35, 2334268), (58, 1408610), (70, 1167134), (116, 704305), (140, 583567), (145, 563444), (203, 402460), (290, 281722), (406, 201230), (580, 140861), (812, 100615), (1015, 80492), (2030, 40246), (4060, 20123)]