15915440

素因数分解:

$2^4\times 5^1\times {\mathrm{198943}}^1$

素因数の和:198956

約数の個数: 20

約数和(自身を含む): 37003584

約数和(自身を除く): 21088144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 198943, 397886, 795772, 994715, 1591544, 1989430, 3183088, 3978860, 7957720, 15915440]

約数ペア:

[(1, 15915440), (2, 7957720), (4, 3978860), (5, 3183088), (8, 1989430), (10, 1591544), (16, 994715), (20, 795772), (40, 397886), (80, 198943)]