81420780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193859}}^1$

素因数の和:193878

約数の個数: 48

約数和(自身を含む): 260547840

約数和(自身を除く): 179127060

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193859, 387718, 581577, 775436, 969295, 1163154, 1357013, 1938590, 2326308, 2714026, 2907885, 3877180, 4071039, 5428052, 5815770, 6785065, 8142078, 11631540, 13570130, 16284156, 20355195, 27140260, 40710390, 81420780]

約数ペア:

[(1, 81420780), (2, 40710390), (3, 27140260), (4, 20355195), (5, 16284156), (6, 13570130), (7, 11631540), (10, 8142078), (12, 6785065), (14, 5815770), (15, 5428052), (20, 4071039), (21, 3877180), (28, 2907885), (30, 2714026), (35, 2326308), (42, 1938590), (60, 1357013), (70, 1163154), (84, 969295), (105, 775436), (140, 581577), (210, 387718), (420, 193859)]