19775140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12841}}^1$

素因数の和:12868

約数の個数: 48

約数和(自身を含む): 51778944

約数和(自身を除く): 32003804

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, 12841, 25682, 51364, 64205, 89887, 128410, 141251, 179774, 256820, 282502, 359548, 449435, 565004, 706255, 898870, 988757, 1412510, 1797740, 1977514, 2825020, 3955028, 4943785, 9887570, 19775140]

約数ペア:

[(1, 19775140), (2, 9887570), (4, 4943785), (5, 3955028), (7, 2825020), (10, 1977514), (11, 1797740), (14, 1412510), (20, 988757), (22, 898870), (28, 706255), (35, 565004), (44, 449435), (55, 359548), (70, 282502), (77, 256820), (110, 179774), (140, 141251), (154, 128410), (220, 89887), (308, 64205), (385, 51364), (770, 25682), (1540, 12841)]