7861980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{18719}}^1$

素因数の和:18738

約数の個数: 48

約数和(自身を含む): 25159680

約数和(自身を除く): 17297700

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, 18719, 37438, 56157, 74876, 93595, 112314, 131033, 187190, 224628, 262066, 280785, 374380, 393099, 524132, 561570, 655165, 786198, 1123140, 1310330, 1572396, 1965495, 2620660, 3930990, 7861980]

約数ペア:

[(1, 7861980), (2, 3930990), (3, 2620660), (4, 1965495), (5, 1572396), (6, 1310330), (7, 1123140), (10, 786198), (12, 655165), (14, 561570), (15, 524132), (20, 393099), (21, 374380), (28, 280785), (30, 262066), (35, 224628), (42, 187190), (60, 131033), (70, 112314), (84, 93595), (105, 74876), (140, 56157), (210, 37438), (420, 18719)]