19985581

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{5297}}^1$

素因数の和:5329

約数の個数: 16

約数和(自身を含む): 25430400

約数和(自身を除く): 5444819

約数列:

[1, 7, 11, 49, 77, 343, 539, 3773, 5297, 37079, 58267, 259553, 407869, 1816871, 2855083, 19985581]

約数ペア:

[(1, 19985581), (7, 2855083), (11, 1816871), (49, 407869), (77, 259553), (343, 58267), (539, 37079), (3773, 5297)]