19994578

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{1721}}^1$

素因数の和:1917

約数の個数: 16

約数和(自身を含む): 31016664

約数和(自身を除く): 11022086

約数列:

[1, 2, 37, 74, 157, 314, 1721, 3442, 5809, 11618, 63677, 127354, 270197, 540394, 9997289, 19994578]

約数ペア:

[(1, 19994578), (2, 9997289), (37, 540394), (74, 270197), (157, 127354), (314, 63677), (1721, 11618), (3442, 5809)]