20807864

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1987}}^1$

素因数の和:2028

約数の個数: 64

約数和(自身を含む): 51528960

約数和(自身を除く): 30721096

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 34, 44, 56, 68, 77, 88, 119, 136, 154, 187, 238, 308, 374, 476, 616, 748, 952, 1309, 1496, 1987, 2618, 3974, 5236, 7948, 10472, 13909, 15896, 21857, 27818, 33779, 43714, 55636, 67558, 87428, 111272, 135116, 152999, 174856, 236453, 270232, 305998, 371569, 472906, 611996, 743138, 945812, 1223992, 1486276, 1891624, 2600983, 2972552, 5201966, 10403932, 20807864]

約数ペア:

[(1, 20807864), (2, 10403932), (4, 5201966), (7, 2972552), (8, 2600983), (11, 1891624), (14, 1486276), (17, 1223992), (22, 945812), (28, 743138), (34, 611996), (44, 472906), (56, 371569), (68, 305998), (77, 270232), (88, 236453), (119, 174856), (136, 152999), (154, 135116), (187, 111272), (238, 87428), (308, 67558), (374, 55636), (476, 43714), (616, 33779), (748, 27818), (952, 21857), (1309, 15896), (1496, 13909), (1987, 10472), (2618, 7948), (3974, 5236)]