16681980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{39719}}^1$

素因数の和:39738

約数の個数: 48

約数和(自身を含む): 53383680

約数和(自身を除く): 36701700

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, 39719, 79438, 119157, 158876, 198595, 238314, 278033, 397190, 476628, 556066, 595785, 794380, 834099, 1112132, 1191570, 1390165, 1668198, 2383140, 2780330, 3336396, 4170495, 5560660, 8340990, 16681980]

約数ペア:

[(1, 16681980), (2, 8340990), (3, 5560660), (4, 4170495), (5, 3336396), (6, 2780330), (7, 2383140), (10, 1668198), (12, 1390165), (14, 1191570), (15, 1112132), (20, 834099), (21, 794380), (28, 595785), (30, 556066), (35, 476628), (42, 397190), (60, 278033), (70, 238314), (84, 198595), (105, 158876), (140, 119157), (210, 79438), (420, 39719)]