81222540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193387}}^1$

素因数の和:193406

約数の個数: 48

約数和(自身を含む): 259913472

約数和(自身を除く): 178690932

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193387, 386774, 580161, 773548, 966935, 1160322, 1353709, 1933870, 2320644, 2707418, 2900805, 3867740, 4061127, 5414836, 5801610, 6768545, 8122254, 11603220, 13537090, 16244508, 20305635, 27074180, 40611270, 81222540]

約数ペア:

[(1, 81222540), (2, 40611270), (3, 27074180), (4, 20305635), (5, 16244508), (6, 13537090), (7, 11603220), (10, 8122254), (12, 6768545), (14, 5801610), (15, 5414836), (20, 4061127), (21, 3867740), (28, 2900805), (30, 2707418), (35, 2320644), (42, 1933870), (60, 1353709), (70, 1160322), (84, 966935), (105, 773548), (140, 580161), (210, 386774), (420, 193387)]