77980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{557}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 187488

約数和(自身を除く): 109508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 557, 1114, 2228, 2785, 3899, 5570, 7798, 11140, 15596, 19495, 38990, 77980]

約数ペア:

[(1, 77980), (2, 38990), (4, 19495), (5, 15596), (7, 11140), (10, 7798), (14, 5570), (20, 3899), (28, 2785), (35, 2228), (70, 1114), (140, 557)]