21356440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{857}}^1$

素因数の和:964

約数の個数: 64

約数和(自身を含む): 55598400

約数和(自身を除く): 34241960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 857, 890, 1246, 1714, 1780, 2492, 3115, 3428, 3560, 4285, 4984, 5999, 6230, 6856, 8570, 11998, 12460, 17140, 23996, 24920, 29995, 34280, 47992, 59990, 76273, 119980, 152546, 239960, 305092, 381365, 533911, 610184, 762730, 1067822, 1525460, 2135644, 2669555, 3050920, 4271288, 5339110, 10678220, 21356440]

約数ペア:

[(1, 21356440), (2, 10678220), (4, 5339110), (5, 4271288), (7, 3050920), (8, 2669555), (10, 2135644), (14, 1525460), (20, 1067822), (28, 762730), (35, 610184), (40, 533911), (56, 381365), (70, 305092), (89, 239960), (140, 152546), (178, 119980), (280, 76273), (356, 59990), (445, 47992), (623, 34280), (712, 29995), (857, 24920), (890, 23996), (1246, 17140), (1714, 12460), (1780, 11998), (2492, 8570), (3115, 6856), (3428, 6230), (3560, 5999), (4285, 4984)]