20409900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{9719}}^1$

素因数の和:9743

約数の個数: 72

約数和(自身を含む): 67495680

約数和(自身を除く): 47085780

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 100, 105, 140, 150, 175, 210, 300, 350, 420, 525, 700, 1050, 2100, 9719, 19438, 29157, 38876, 48595, 58314, 68033, 97190, 116628, 136066, 145785, 194380, 204099, 242975, 272132, 291570, 340165, 408198, 485950, 583140, 680330, 728925, 816396, 971900, 1020495, 1360660, 1457850, 1700825, 2040990, 2915700, 3401650, 4081980, 5102475, 6803300, 10204950, 20409900]

約数ペア:

[(1, 20409900), (2, 10204950), (3, 6803300), (4, 5102475), (5, 4081980), (6, 3401650), (7, 2915700), (10, 2040990), (12, 1700825), (14, 1457850), (15, 1360660), (20, 1020495), (21, 971900), (25, 816396), (28, 728925), (30, 680330), (35, 583140), (42, 485950), (50, 408198), (60, 340165), (70, 291570), (75, 272132), (84, 242975), (100, 204099), (105, 194380), (140, 145785), (150, 136066), (175, 116628), (210, 97190), (300, 68033), (350, 58314), (420, 48595), (525, 38876), (700, 29157), (1050, 19438), (2100, 9719)]