280809980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1276409}}^1$

素因数の和:1276429

約数の個数: 24

約数和(自身を含む): 643310640

約数和(自身を除く): 362500660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 1276409, 2552818, 5105636, 6382045, 12764090, 14040499, 25528180, 28080998, 56161996, 70202495, 140404990, 280809980]

約数ペア:

[(1, 280809980), (2, 140404990), (4, 70202495), (5, 56161996), (10, 28080998), (11, 25528180), (20, 14040499), (22, 12764090), (44, 6382045), (55, 5105636), (110, 2552818), (220, 1276409)]