18920020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{907}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 45763200

約数和(自身を除く): 26843180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 907, 1043, 1490, 1814, 2086, 2980, 3628, 4172, 4535, 5215, 6349, 9070, 10430, 12698, 18140, 20860, 25396, 31745, 63490, 126980, 135143, 270286, 540572, 675715, 946001, 1351430, 1892002, 2702860, 3784004, 4730005, 9460010, 18920020]

約数ペア:

[(1, 18920020), (2, 9460010), (4, 4730005), (5, 3784004), (7, 2702860), (10, 1892002), (14, 1351430), (20, 946001), (28, 675715), (35, 540572), (70, 270286), (140, 135143), (149, 126980), (298, 63490), (596, 31745), (745, 25396), (907, 20860), (1043, 18140), (1490, 12698), (1814, 10430), (2086, 9070), (2980, 6349), (3628, 5215), (4172, 4535)]