12740245

素因数分解:

$5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{349}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 17955000

約数和(自身を除く): 5214755

約数列:

[1, 5, 7, 35, 49, 149, 245, 349, 745, 1043, 1745, 2443, 5215, 7301, 12215, 17101, 36505, 52001, 85505, 260005, 364007, 1820035, 2548049, 12740245]

約数ペア:

[(1, 12740245), (5, 2548049), (7, 1820035), (35, 364007), (49, 260005), (149, 85505), (245, 52001), (349, 36505), (745, 17101), (1043, 12215), (1745, 7301), (2443, 5215)]