20995100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{337}}^1$

素因数の和:447

約数の個数: 72

約数和(自身を含む): 52809120

約数和(自身を除く): 31814020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 89, 100, 140, 175, 178, 337, 350, 356, 445, 623, 674, 700, 890, 1246, 1348, 1685, 1780, 2225, 2359, 2492, 3115, 3370, 4450, 4718, 6230, 6740, 8425, 8900, 9436, 11795, 12460, 15575, 16850, 23590, 29993, 31150, 33700, 47180, 58975, 59986, 62300, 117950, 119972, 149965, 209951, 235900, 299930, 419902, 599860, 749825, 839804, 1049755, 1499650, 2099510, 2999300, 4199020, 5248775, 10497550, 20995100]

約数ペア:

[(1, 20995100), (2, 10497550), (4, 5248775), (5, 4199020), (7, 2999300), (10, 2099510), (14, 1499650), (20, 1049755), (25, 839804), (28, 749825), (35, 599860), (50, 419902), (70, 299930), (89, 235900), (100, 209951), (140, 149965), (175, 119972), (178, 117950), (337, 62300), (350, 59986), (356, 58975), (445, 47180), (623, 33700), (674, 31150), (700, 29993), (890, 23590), (1246, 16850), (1348, 15575), (1685, 12460), (1780, 11795), (2225, 9436), (2359, 8900), (2492, 8425), (3115, 6740), (3370, 6230), (4450, 4718)]