20884545

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1361}}^1$

素因数の和:1414

約数の個数: 48

約数和(自身を含む): 40794624

約数和(自身を除く): 19910079

約数列:

[1, 3, 5, 9, 11, 15, 31, 33, 45, 55, 93, 99, 155, 165, 279, 341, 465, 495, 1023, 1361, 1395, 1705, 3069, 4083, 5115, 6805, 12249, 14971, 15345, 20415, 42191, 44913, 61245, 74855, 126573, 134739, 210955, 224565, 379719, 464101, 632865, 673695, 1392303, 1898595, 2320505, 4176909, 6961515, 20884545]

約数ペア:

[(1, 20884545), (3, 6961515), (5, 4176909), (9, 2320505), (11, 1898595), (15, 1392303), (31, 673695), (33, 632865), (45, 464101), (55, 379719), (93, 224565), (99, 210955), (155, 134739), (165, 126573), (279, 74855), (341, 61245), (465, 44913), (495, 42191), (1023, 20415), (1361, 15345), (1395, 14971), (1705, 12249), (3069, 6805), (4083, 5115)]