164006980

素因数分解:

$2^2\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{4127}}^1$

素因数の和:6123

約数の個数: 24

約数和(自身を含む): 344671488

約数和(自身を除く): 180664508

約数列:

[1, 2, 4, 5, 10, 20, 1987, 3974, 4127, 7948, 8254, 9935, 16508, 19870, 20635, 39740, 41270, 82540, 8200349, 16400698, 32801396, 41001745, 82003490, 164006980]

約数ペア:

[(1, 164006980), (2, 82003490), (4, 41001745), (5, 32801396), (10, 16400698), (20, 8200349), (1987, 82540), (3974, 41270), (4127, 39740), (7948, 20635), (8254, 19870), (9935, 16508)]