19939975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{2339}}^1$

素因数の和:2391

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 7915385

約数列:

[1, 5, 11, 25, 31, 55, 155, 275, 341, 775, 1705, 2339, 8525, 11695, 25729, 58475, 72509, 128645, 362545, 643225, 797599, 1812725, 3987995, 19939975]

約数ペア:

[(1, 19939975), (5, 3987995), (11, 1812725), (25, 797599), (31, 643225), (55, 362545), (155, 128645), (275, 72509), (341, 58475), (775, 25729), (1705, 11695), (2339, 8525)]