18490780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12007}}^1$

素因数の和:12034

約数の個数: 48

約数和(自身を含む): 48416256

約数和(自身を除く): 29925476

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 12007, 24014, 48028, 60035, 84049, 120070, 132077, 168098, 240140, 264154, 336196, 420245, 528308, 660385, 840490, 924539, 1320770, 1680980, 1849078, 2641540, 3698156, 4622695, 9245390, 18490780]

約数ペア:

[(1, 18490780), (2, 9245390), (4, 4622695), (5, 3698156), (7, 2641540), (10, 1849078), (11, 1680980), (14, 1320770), (20, 924539), (22, 840490), (28, 660385), (35, 528308), (44, 420245), (55, 336196), (70, 264154), (77, 240140), (110, 168098), (140, 132077), (154, 120070), (220, 84049), (308, 60035), (385, 48028), (770, 24014), (1540, 12007)]