20787018

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28564662

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 67, 83, 89, 134, 166, 178, 201, 249, 267, 402, 469, 498, 534, 581, 623, 938, 1162, 1246, 1407, 1743, 1869, 2814, 3486, 3738, 5561, 5963, 7387, 11122, 11926, 14774, 16683, 17889, 22161, 33366, 35778, 38927, 41741, 44322, 51709, 77854, 83482, 103418, 116781, 125223, 155127, 233562, 250446, 310254, 494929, 989858, 1484787, 2969574, 3464503, 6929006, 10393509, 20787018]

約数ペア:

[(1, 20787018), (2, 10393509), (3, 6929006), (6, 3464503), (7, 2969574), (14, 1484787), (21, 989858), (42, 494929), (67, 310254), (83, 250446), (89, 233562), (134, 155127), (166, 125223), (178, 116781), (201, 103418), (249, 83482), (267, 77854), (402, 51709), (469, 44322), (498, 41741), (534, 38927), (581, 35778), (623, 33366), (938, 22161), (1162, 17889), (1246, 16683), (1407, 14774), (1743, 11926), (1869, 11122), (2814, 7387), (3486, 5963), (3738, 5561)]