20658105

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 19661895

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 79, 117, 135, 149, 195, 237, 351, 395, 447, 585, 711, 745, 1027, 1185, 1341, 1755, 1937, 2133, 2235, 3081, 3555, 4023, 5135, 5811, 6705, 9243, 9685, 10665, 11771, 15405, 17433, 20115, 27729, 29055, 35313, 46215, 52299, 58855, 87165, 105939, 138645, 153023, 176565, 261495, 317817, 459069, 529695, 765115, 1377207, 1589085, 2295345, 4131621, 6886035, 20658105]

約数ペア:

[(1, 20658105), (3, 6886035), (5, 4131621), (9, 2295345), (13, 1589085), (15, 1377207), (27, 765115), (39, 529695), (45, 459069), (65, 317817), (79, 261495), (117, 176565), (135, 153023), (149, 138645), (195, 105939), (237, 87165), (351, 58855), (395, 52299), (447, 46215), (585, 35313), (711, 29055), (745, 27729), (1027, 20115), (1185, 17433), (1341, 15405), (1755, 11771), (1937, 10665), (2133, 9685), (2235, 9243), (3081, 6705), (3555, 5811), (4023, 5135)]