20896785

素因数分解:

$3^8\times 5^1\times 7^2\times {\mathrm{13}}^1$

素因数の和:56

約数の個数: 108

約数和(自身を含む): 47118708

約数和(自身を除く): 26221923

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 49, 63, 65, 81, 91, 105, 117, 135, 147, 189, 195, 243, 245, 273, 315, 351, 405, 441, 455, 567, 585, 637, 729, 735, 819, 945, 1053, 1215, 1323, 1365, 1701, 1755, 1911, 2187, 2205, 2457, 2835, 3159, 3185, 3645, 3969, 4095, 5103, 5265, 5733, 6561, 6615, 7371, 8505, 9477, 9555, 10935, 11907, 12285, 15309, 15795, 17199, 19845, 22113, 25515, 28431, 28665, 32805, 35721, 36855, 45927, 47385, 51597, 59535, 66339, 76545, 85293, 85995, 107163, 110565, 142155, 154791, 178605, 199017, 229635, 257985, 321489, 331695, 426465, 464373, 535815, 597051, 773955, 995085, 1393119, 1607445, 2321865, 2985255, 4179357, 6965595, 20896785]

約数ペア:

[(1, 20896785), (3, 6965595), (5, 4179357), (7, 2985255), (9, 2321865), (13, 1607445), (15, 1393119), (21, 995085), (27, 773955), (35, 597051), (39, 535815), (45, 464373), (49, 426465), (63, 331695), (65, 321489), (81, 257985), (91, 229635), (105, 199017), (117, 178605), (135, 154791), (147, 142155), (189, 110565), (195, 107163), (243, 85995), (245, 85293), (273, 76545), (315, 66339), (351, 59535), (405, 51597), (441, 47385), (455, 45927), (567, 36855), (585, 35721), (637, 32805), (729, 28665), (735, 28431), (819, 25515), (945, 22113), (1053, 19845), (1215, 17199), (1323, 15795), (1365, 15309), (1701, 12285), (1755, 11907), (1911, 10935), (2187, 9555), (2205, 9477), (2457, 8505), (2835, 7371), (3159, 6615), (3185, 6561), (3645, 5733), (3969, 5265), (4095, 5103)]