639647516

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{12893}}^1$

素因数の和:13133

約数の個数: 24

約数和(自身を含む): 1140861120

約数和(自身を除く): 501213604

約数列:

[1, 2, 4, 79, 157, 158, 314, 316, 628, 12403, 12893, 24806, 25786, 49612, 51572, 1018547, 2024201, 2037094, 4048402, 4074188, 8096804, 159911879, 319823758, 639647516]

約数ペア:

[(1, 639647516), (2, 319823758), (4, 159911879), (79, 8096804), (157, 4074188), (158, 4048402), (314, 2037094), (316, 2024201), (628, 1018547), (12403, 51572), (12893, 49612), (24806, 25786)]