20328880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1777}}^1$

素因数の和:1814

約数の個数: 80

約数和(自身を含む): 55558944

約数和(自身を除く): 35230064

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 130, 143, 176, 208, 220, 260, 286, 440, 520, 572, 715, 880, 1040, 1144, 1430, 1777, 2288, 2860, 3554, 5720, 7108, 8885, 11440, 14216, 17770, 19547, 23101, 28432, 35540, 39094, 46202, 71080, 78188, 92404, 97735, 115505, 142160, 156376, 184808, 195470, 231010, 254111, 312752, 369616, 390940, 462020, 508222, 781880, 924040, 1016444, 1270555, 1563760, 1848080, 2032888, 2541110, 4065776, 5082220, 10164440, 20328880]

約数ペア:

[(1, 20328880), (2, 10164440), (4, 5082220), (5, 4065776), (8, 2541110), (10, 2032888), (11, 1848080), (13, 1563760), (16, 1270555), (20, 1016444), (22, 924040), (26, 781880), (40, 508222), (44, 462020), (52, 390940), (55, 369616), (65, 312752), (80, 254111), (88, 231010), (104, 195470), (110, 184808), (130, 156376), (143, 142160), (176, 115505), (208, 97735), (220, 92404), (260, 78188), (286, 71080), (440, 46202), (520, 39094), (572, 35540), (715, 28432), (880, 23101), (1040, 19547), (1144, 17770), (1430, 14216), (1777, 11440), (2288, 8885), (2860, 7108), (3554, 5720)]