21212685

素因数分解:

$3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 44029440

約数和(自身を除く): 22816755

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 79, 81, 85, 117, 135, 153, 195, 221, 237, 243, 255, 351, 395, 405, 459, 585, 663, 711, 765, 1027, 1053, 1105, 1185, 1215, 1343, 1377, 1755, 1989, 2133, 2295, 3081, 3159, 3315, 3555, 4029, 4131, 5135, 5265, 5967, 6399, 6715, 6885, 9243, 9945, 10665, 12087, 15405, 15795, 17459, 17901, 19197, 20145, 20655, 27729, 29835, 31995, 36261, 46215, 52377, 53703, 60435, 83187, 87295, 89505, 95985, 108783, 138645, 157131, 181305, 249561, 261885, 268515, 326349, 415935, 471393, 543915, 785655, 1247805, 1414179, 1631745, 2356965, 4242537, 7070895, 21212685]

約数ペア:

[(1, 21212685), (3, 7070895), (5, 4242537), (9, 2356965), (13, 1631745), (15, 1414179), (17, 1247805), (27, 785655), (39, 543915), (45, 471393), (51, 415935), (65, 326349), (79, 268515), (81, 261885), (85, 249561), (117, 181305), (135, 157131), (153, 138645), (195, 108783), (221, 95985), (237, 89505), (243, 87295), (255, 83187), (351, 60435), (395, 53703), (405, 52377), (459, 46215), (585, 36261), (663, 31995), (711, 29835), (765, 27729), (1027, 20655), (1053, 20145), (1105, 19197), (1185, 17901), (1215, 17459), (1343, 15795), (1377, 15405), (1755, 12087), (1989, 10665), (2133, 9945), (2295, 9243), (3081, 6885), (3159, 6715), (3315, 6399), (3555, 5967), (4029, 5265), (4131, 5135)]