20680720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^2\times {\mathrm{269}}^1$

素因数の和:344

約数の個数: 60

約数和(自身を含む): 49868460

約数和(自身を除く): 29187740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 269, 310, 496, 538, 620, 961, 1076, 1240, 1345, 1922, 2152, 2480, 2690, 3844, 4304, 4805, 5380, 7688, 8339, 9610, 10760, 15376, 16678, 19220, 21520, 33356, 38440, 41695, 66712, 76880, 83390, 133424, 166780, 258509, 333560, 517018, 667120, 1034036, 1292545, 2068072, 2585090, 4136144, 5170180, 10340360, 20680720]

約数ペア:

[(1, 20680720), (2, 10340360), (4, 5170180), (5, 4136144), (8, 2585090), (10, 2068072), (16, 1292545), (20, 1034036), (31, 667120), (40, 517018), (62, 333560), (80, 258509), (124, 166780), (155, 133424), (248, 83390), (269, 76880), (310, 66712), (496, 41695), (538, 38440), (620, 33356), (961, 21520), (1076, 19220), (1240, 16678), (1345, 15376), (1922, 10760), (2152, 9610), (2480, 8339), (2690, 7688), (3844, 5380), (4304, 4805)]