21991900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:463

約数の個数: 72

約数和(自身を含む): 55308960

約数和(自身を除く): 33317060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 89, 100, 140, 175, 178, 350, 353, 356, 445, 623, 700, 706, 890, 1246, 1412, 1765, 1780, 2225, 2471, 2492, 3115, 3530, 4450, 4942, 6230, 7060, 8825, 8900, 9884, 12355, 12460, 15575, 17650, 24710, 31150, 31417, 35300, 49420, 61775, 62300, 62834, 123550, 125668, 157085, 219919, 247100, 314170, 439838, 628340, 785425, 879676, 1099595, 1570850, 2199190, 3141700, 4398380, 5497975, 10995950, 21991900]

約数ペア:

[(1, 21991900), (2, 10995950), (4, 5497975), (5, 4398380), (7, 3141700), (10, 2199190), (14, 1570850), (20, 1099595), (25, 879676), (28, 785425), (35, 628340), (50, 439838), (70, 314170), (89, 247100), (100, 219919), (140, 157085), (175, 125668), (178, 123550), (350, 62834), (353, 62300), (356, 61775), (445, 49420), (623, 35300), (700, 31417), (706, 31150), (890, 24710), (1246, 17650), (1412, 15575), (1765, 12460), (1780, 12355), (2225, 9884), (2471, 8900), (2492, 8825), (3115, 7060), (3530, 6230), (4450, 4942)]