2788940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1811}}^1$

素因数の和:1838

約数の個数: 48

約数和(自身を含む): 7305984

約数和(自身を除く): 4517044

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, 1811, 3622, 7244, 9055, 12677, 18110, 19921, 25354, 36220, 39842, 50708, 63385, 79684, 99605, 126770, 139447, 199210, 253540, 278894, 398420, 557788, 697235, 1394470, 2788940]

約数ペア:

[(1, 2788940), (2, 1394470), (4, 697235), (5, 557788), (7, 398420), (10, 278894), (11, 253540), (14, 199210), (20, 139447), (22, 126770), (28, 99605), (35, 79684), (44, 63385), (55, 50708), (70, 39842), (77, 36220), (110, 25354), (140, 19921), (154, 18110), (220, 12677), (308, 9055), (385, 7244), (770, 3622), (1540, 1811)]