1328840

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{239}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 3024000

約数和(自身を除く): 1695160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 239, 278, 478, 556, 695, 956, 1112, 1195, 1390, 1912, 2390, 2780, 4780, 5560, 9560, 33221, 66442, 132884, 166105, 265768, 332210, 664420, 1328840]

約数ペア:

[(1, 1328840), (2, 664420), (4, 332210), (5, 265768), (8, 166105), (10, 132884), (20, 66442), (40, 33221), (139, 9560), (239, 5560), (278, 4780), (478, 2780), (556, 2390), (695, 1912), (956, 1390), (1112, 1195)]