20903608

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 46072800

約数和(自身を除く): 25169192

約数列:

[1, 2, 4, 8, 11, 17, 22, 34, 44, 68, 88, 89, 136, 157, 178, 187, 314, 356, 374, 628, 712, 748, 979, 1256, 1496, 1513, 1727, 1958, 2669, 3026, 3454, 3916, 5338, 6052, 6908, 7832, 10676, 12104, 13816, 13973, 16643, 21352, 27946, 29359, 33286, 55892, 58718, 66572, 111784, 117436, 133144, 153703, 234872, 237541, 307406, 475082, 614812, 950164, 1229624, 1900328, 2612951, 5225902, 10451804, 20903608]

約数ペア:

[(1, 20903608), (2, 10451804), (4, 5225902), (8, 2612951), (11, 1900328), (17, 1229624), (22, 950164), (34, 614812), (44, 475082), (68, 307406), (88, 237541), (89, 234872), (136, 153703), (157, 133144), (178, 117436), (187, 111784), (314, 66572), (356, 58718), (374, 55892), (628, 33286), (712, 29359), (748, 27946), (979, 21352), (1256, 16643), (1496, 13973), (1513, 13816), (1727, 12104), (1958, 10676), (2669, 7832), (3026, 6908), (3454, 6052), (3916, 5338)]