19883888

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{28901}}^1$

素因数の和:28952

約数の個数: 20

約数和(自身を含む): 39422328

約数和(自身を除く): 19538440

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 28901, 57802, 115604, 231208, 462416, 1242743, 2485486, 4970972, 9941944, 19883888]

約数ペア:

[(1, 19883888), (2, 9941944), (4, 4970972), (8, 2485486), (16, 1242743), (43, 462416), (86, 231208), (172, 115604), (344, 57802), (688, 28901)]