19645780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12757}}^1$

素因数の和:12784

約数の個数: 48

約数和(自身を含む): 51440256

約数和(自身を除く): 31794476

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, 12757, 25514, 51028, 63785, 89299, 127570, 140327, 178598, 255140, 280654, 357196, 446495, 561308, 701635, 892990, 982289, 1403270, 1785980, 1964578, 2806540, 3929156, 4911445, 9822890, 19645780]

約数ペア:

[(1, 19645780), (2, 9822890), (4, 4911445), (5, 3929156), (7, 2806540), (10, 1964578), (11, 1785980), (14, 1403270), (20, 982289), (22, 892990), (28, 701635), (35, 561308), (44, 446495), (55, 357196), (70, 280654), (77, 255140), (110, 178598), (140, 140327), (154, 127570), (220, 89299), (308, 63785), (385, 51028), (770, 25514), (1540, 12757)]