20408080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3313}}^1$

素因数の和:3344

約数の個数: 80

約数和(自身を含む): 59174784

約数和(自身を除く): 38766704

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 3313, 6160, 6626, 13252, 16565, 23191, 26504, 33130, 36443, 46382, 53008, 66260, 72886, 92764, 115955, 132520, 145772, 182215, 185528, 231910, 255101, 265040, 291544, 364430, 371056, 463820, 510202, 583088, 728860, 927640, 1020404, 1275505, 1457720, 1855280, 2040808, 2551010, 2915440, 4081616, 5102020, 10204040, 20408080]

約数ペア:

[(1, 20408080), (2, 10204040), (4, 5102020), (5, 4081616), (7, 2915440), (8, 2551010), (10, 2040808), (11, 1855280), (14, 1457720), (16, 1275505), (20, 1020404), (22, 927640), (28, 728860), (35, 583088), (40, 510202), (44, 463820), (55, 371056), (56, 364430), (70, 291544), (77, 265040), (80, 255101), (88, 231910), (110, 185528), (112, 182215), (140, 145772), (154, 132520), (176, 115955), (220, 92764), (280, 72886), (308, 66260), (385, 53008), (440, 46382), (560, 36443), (616, 33130), (770, 26504), (880, 23191), (1232, 16565), (1540, 13252), (3080, 6626), (3313, 6160)]