21497800

素因数分解:

$2^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{2287}}^1$

素因数の和:2350

約数の個数: 48

約数和(自身を含む): 51068160

約数和(自身を除く): 29570360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 47, 50, 94, 100, 188, 200, 235, 376, 470, 940, 1175, 1880, 2287, 2350, 4574, 4700, 9148, 9400, 11435, 18296, 22870, 45740, 57175, 91480, 107489, 114350, 214978, 228700, 429956, 457400, 537445, 859912, 1074890, 2149780, 2687225, 4299560, 5374450, 10748900, 21497800]

約数ペア:

[(1, 21497800), (2, 10748900), (4, 5374450), (5, 4299560), (8, 2687225), (10, 2149780), (20, 1074890), (25, 859912), (40, 537445), (47, 457400), (50, 429956), (94, 228700), (100, 214978), (188, 114350), (200, 107489), (235, 91480), (376, 57175), (470, 45740), (940, 22870), (1175, 18296), (1880, 11435), (2287, 9400), (2350, 9148), (4574, 4700)]