19995651

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 33196800

約数和(自身を除く): 13201149

約数列:

[1, 3, 9, 13, 31, 37, 39, 93, 111, 117, 149, 279, 333, 403, 447, 481, 1147, 1209, 1341, 1443, 1937, 3441, 3627, 4329, 4619, 5513, 5811, 10323, 13857, 14911, 16539, 17433, 41571, 44733, 49617, 60047, 71669, 134199, 170903, 180141, 215007, 512709, 540423, 645021, 1538127, 2221739, 6665217, 19995651]

約数ペア:

[(1, 19995651), (3, 6665217), (9, 2221739), (13, 1538127), (31, 645021), (37, 540423), (39, 512709), (93, 215007), (111, 180141), (117, 170903), (149, 134199), (279, 71669), (333, 60047), (403, 49617), (447, 44733), (481, 41571), (1147, 17433), (1209, 16539), (1341, 14911), (1443, 13857), (1937, 10323), (3441, 5811), (3627, 5513), (4329, 4619)]