81960640

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6247}}^1$

素因数の和:6305

約数の個数: 56

約数和(自身を含む): 199960992

約数和(自身を除く): 118000352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1640, 2624, 3280, 6247, 6560, 12494, 13120, 24988, 31235, 49976, 62470, 99952, 124940, 199904, 249880, 256127, 399808, 499760, 512254, 999520, 1024508, 1280635, 1999040, 2049016, 2561270, 4098032, 5122540, 8196064, 10245080, 16392128, 20490160, 40980320, 81960640]

約数ペア:

[(1, 81960640), (2, 40980320), (4, 20490160), (5, 16392128), (8, 10245080), (10, 8196064), (16, 5122540), (20, 4098032), (32, 2561270), (40, 2049016), (41, 1999040), (64, 1280635), (80, 1024508), (82, 999520), (160, 512254), (164, 499760), (205, 399808), (320, 256127), (328, 249880), (410, 199904), (656, 124940), (820, 99952), (1312, 62470), (1640, 49976), (2624, 31235), (3280, 24988), (6247, 13120), (6560, 12494)]