19678480

素因数分解:

$2^4\times 5^1\times {\mathrm{245981}}^1$

素因数の和:245994

約数の個数: 20

約数和(自身を含む): 45752652

約数和(自身を除く): 26074172

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245981, 491962, 983924, 1229905, 1967848, 2459810, 3935696, 4919620, 9839240, 19678480]

約数ペア:

[(1, 19678480), (2, 9839240), (4, 4919620), (5, 3935696), (8, 2459810), (10, 1967848), (16, 1229905), (20, 983924), (40, 491962), (80, 245981)]