20515520

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1051}}^1$

素因数の和:1129

約数の個数: 56

約数和(自身を含む): 49700688

約数和(自身を除く): 29185168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1051, 1220, 1952, 2102, 2440, 3904, 4204, 4880, 5255, 8408, 9760, 10510, 16816, 19520, 21020, 33632, 42040, 64111, 67264, 84080, 128222, 168160, 256444, 320555, 336320, 512888, 641110, 1025776, 1282220, 2051552, 2564440, 4103104, 5128880, 10257760, 20515520]

約数ペア:

[(1, 20515520), (2, 10257760), (4, 5128880), (5, 4103104), (8, 2564440), (10, 2051552), (16, 1282220), (20, 1025776), (32, 641110), (40, 512888), (61, 336320), (64, 320555), (80, 256444), (122, 168160), (160, 128222), (244, 84080), (305, 67264), (320, 64111), (488, 42040), (610, 33632), (976, 21020), (1051, 19520), (1220, 16816), (1952, 10510), (2102, 9760), (2440, 8408), (3904, 5255), (4204, 4880)]