21788760

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25939}}^1$

素因数の和:25960

約数の個数: 64

約数和(自身を含む): 74707200

約数和(自身を除く): 52918440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25939, 51878, 77817, 103756, 129695, 155634, 181573, 207512, 259390, 311268, 363146, 389085, 518780, 544719, 622536, 726292, 778170, 907865, 1037560, 1089438, 1452584, 1556340, 1815730, 2178876, 2723595, 3112680, 3631460, 4357752, 5447190, 7262920, 10894380, 21788760]

約数ペア:

[(1, 21788760), (2, 10894380), (3, 7262920), (4, 5447190), (5, 4357752), (6, 3631460), (7, 3112680), (8, 2723595), (10, 2178876), (12, 1815730), (14, 1556340), (15, 1452584), (20, 1089438), (21, 1037560), (24, 907865), (28, 778170), (30, 726292), (35, 622536), (40, 544719), (42, 518780), (56, 389085), (60, 363146), (70, 311268), (84, 259390), (105, 207512), (120, 181573), (140, 155634), (168, 129695), (210, 103756), (280, 77817), (420, 51878), (840, 25939)]