18983855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{349}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 26611200

約数和(自身を除く): 7627345

約数列:

[1, 5, 11, 23, 43, 55, 115, 215, 253, 349, 473, 989, 1265, 1745, 2365, 3839, 4945, 8027, 10879, 15007, 19195, 40135, 54395, 75035, 88297, 165077, 345161, 441485, 825385, 1725805, 3796771, 18983855]

約数ペア:

[(1, 18983855), (5, 3796771), (11, 1725805), (23, 825385), (43, 441485), (55, 345161), (115, 165077), (215, 88297), (253, 75035), (349, 54395), (473, 40135), (989, 19195), (1265, 15007), (1745, 10879), (2365, 8027), (3839, 4945)]