20688800

素因数分解:

$2^5\times 5^2\times {\mathrm{11}}^1\times {\mathrm{2351}}^1$

素因数の和:2382

約数の個数: 72

約数和(自身を含む): 55121472

約数和(自身を除く): 34432672

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 50, 55, 80, 88, 100, 110, 160, 176, 200, 220, 275, 352, 400, 440, 550, 800, 880, 1100, 1760, 2200, 2351, 4400, 4702, 8800, 9404, 11755, 18808, 23510, 25861, 37616, 47020, 51722, 58775, 75232, 94040, 103444, 117550, 129305, 188080, 206888, 235100, 258610, 376160, 413776, 470200, 517220, 646525, 827552, 940400, 1034440, 1293050, 1880800, 2068880, 2586100, 4137760, 5172200, 10344400, 20688800]

約数ペア:

[(1, 20688800), (2, 10344400), (4, 5172200), (5, 4137760), (8, 2586100), (10, 2068880), (11, 1880800), (16, 1293050), (20, 1034440), (22, 940400), (25, 827552), (32, 646525), (40, 517220), (44, 470200), (50, 413776), (55, 376160), (80, 258610), (88, 235100), (100, 206888), (110, 188080), (160, 129305), (176, 117550), (200, 103444), (220, 94040), (275, 75232), (352, 58775), (400, 51722), (440, 47020), (550, 37616), (800, 25861), (880, 23510), (1100, 18808), (1760, 11755), (2200, 9404), (2351, 8800), (4400, 4702)]