20216655

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{383}}^1$

素因数の和:437

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19596465

約数列:

[1, 3, 5, 9, 15, 17, 23, 27, 45, 51, 69, 85, 115, 135, 153, 207, 255, 345, 383, 391, 459, 621, 765, 1035, 1149, 1173, 1915, 1955, 2295, 3105, 3447, 3519, 5745, 5865, 6511, 8809, 10341, 10557, 17235, 17595, 19533, 26427, 32555, 44045, 51705, 52785, 58599, 79281, 97665, 132135, 149753, 175797, 237843, 292995, 396405, 449259, 748765, 878985, 1189215, 1347777, 2246295, 4043331, 6738885, 20216655]

約数ペア:

[(1, 20216655), (3, 6738885), (5, 4043331), (9, 2246295), (15, 1347777), (17, 1189215), (23, 878985), (27, 748765), (45, 449259), (51, 396405), (69, 292995), (85, 237843), (115, 175797), (135, 149753), (153, 132135), (207, 97665), (255, 79281), (345, 58599), (383, 52785), (391, 51705), (459, 44045), (621, 32555), (765, 26427), (1035, 19533), (1149, 17595), (1173, 17235), (1915, 10557), (1955, 10341), (2295, 8809), (3105, 6511), (3447, 5865), (3519, 5745)]