20710720

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1061}}^1$

素因数の和:1139

約数の個数: 56

約数和(自身を含む): 50173128

約数和(自身を除く): 29462408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1061, 1220, 1952, 2122, 2440, 3904, 4244, 4880, 5305, 8488, 9760, 10610, 16976, 19520, 21220, 33952, 42440, 64721, 67904, 84880, 129442, 169760, 258884, 323605, 339520, 517768, 647210, 1035536, 1294420, 2071072, 2588840, 4142144, 5177680, 10355360, 20710720]

約数ペア:

[(1, 20710720), (2, 10355360), (4, 5177680), (5, 4142144), (8, 2588840), (10, 2071072), (16, 1294420), (20, 1035536), (32, 647210), (40, 517768), (61, 339520), (64, 323605), (80, 258884), (122, 169760), (160, 129442), (244, 84880), (305, 67904), (320, 64721), (488, 42440), (610, 33952), (976, 21220), (1061, 19520), (1220, 16976), (1952, 10610), (2122, 9760), (2440, 8488), (3904, 5305), (4244, 4880)]