639450244

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{77191}}^1$

素因数の和:77323

約数の個数: 24

約数和(自身を含む): 1188756800

約数和(自身を除く): 549306556

約数列:

[1, 2, 4, 19, 38, 76, 109, 218, 436, 2071, 4142, 8284, 77191, 154382, 308764, 1466629, 2933258, 5866516, 8413819, 16827638, 33655276, 159862561, 319725122, 639450244]

約数ペア:

[(1, 639450244), (2, 319725122), (4, 159862561), (19, 33655276), (38, 16827638), (76, 8413819), (109, 5866516), (218, 2933258), (436, 1466629), (2071, 308764), (4142, 154382), (8284, 77191)]