311920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{557}}^1$

素因数の和:577

約数の個数: 40

約数和(自身を含む): 830304

約数和(自身を除く): 518384

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 557, 560, 1114, 2228, 2785, 3899, 4456, 5570, 7798, 8912, 11140, 15596, 19495, 22280, 31192, 38990, 44560, 62384, 77980, 155960, 311920]

約数ペア:

[(1, 311920), (2, 155960), (4, 77980), (5, 62384), (7, 44560), (8, 38990), (10, 31192), (14, 22280), (16, 19495), (20, 15596), (28, 11140), (35, 8912), (40, 7798), (56, 5570), (70, 4456), (80, 3899), (112, 2785), (140, 2228), (280, 1114), (557, 560)]