20744505

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:188

約数の個数: 80

約数和(自身を含む): 41399424

約数和(自身を除く): 20654919

約数列:

[1, 3, 5, 9, 15, 17, 23, 27, 45, 51, 69, 81, 85, 115, 131, 135, 153, 207, 255, 345, 391, 393, 405, 459, 621, 655, 765, 1035, 1173, 1179, 1377, 1863, 1955, 1965, 2227, 2295, 3013, 3105, 3519, 3537, 5865, 5895, 6681, 6885, 9039, 9315, 10557, 10611, 11135, 15065, 17595, 17685, 20043, 27117, 31671, 33405, 45195, 51221, 52785, 53055, 60129, 81351, 100215, 135585, 153663, 158355, 180387, 244053, 256105, 300645, 406755, 460989, 768315, 901935, 1220265, 1382967, 2304945, 4148901, 6914835, 20744505]

約数ペア:

[(1, 20744505), (3, 6914835), (5, 4148901), (9, 2304945), (15, 1382967), (17, 1220265), (23, 901935), (27, 768315), (45, 460989), (51, 406755), (69, 300645), (81, 256105), (85, 244053), (115, 180387), (131, 158355), (135, 153663), (153, 135585), (207, 100215), (255, 81351), (345, 60129), (391, 53055), (393, 52785), (405, 51221), (459, 45195), (621, 33405), (655, 31671), (765, 27117), (1035, 20043), (1173, 17685), (1179, 17595), (1377, 15065), (1863, 11135), (1955, 10611), (1965, 10557), (2227, 9315), (2295, 9039), (3013, 6885), (3105, 6681), (3519, 5895), (3537, 5865)]