280858960

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:532

約数の個数: 80

約数和(自身を含む): 668207232

約数和(自身を除く): 387348272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 197, 251, 284, 355, 394, 502, 568, 710, 788, 985, 1004, 1136, 1255, 1420, 1576, 1970, 2008, 2510, 2840, 3152, 3940, 4016, 5020, 5680, 7880, 10040, 13987, 15760, 17821, 20080, 27974, 35642, 49447, 55948, 69935, 71284, 89105, 98894, 111896, 139870, 142568, 178210, 197788, 223792, 247235, 279740, 285136, 356420, 395576, 494470, 559480, 712840, 791152, 988940, 1118960, 1425680, 1977880, 3510737, 3955760, 7021474, 14042948, 17553685, 28085896, 35107370, 56171792, 70214740, 140429480, 280858960]

約数ペア:

[(1, 280858960), (2, 140429480), (4, 70214740), (5, 56171792), (8, 35107370), (10, 28085896), (16, 17553685), (20, 14042948), (40, 7021474), (71, 3955760), (80, 3510737), (142, 1977880), (197, 1425680), (251, 1118960), (284, 988940), (355, 791152), (394, 712840), (502, 559480), (568, 494470), (710, 395576), (788, 356420), (985, 285136), (1004, 279740), (1136, 247235), (1255, 223792), (1420, 197788), (1576, 178210), (1970, 142568), (2008, 139870), (2510, 111896), (2840, 98894), (3152, 89105), (3940, 71284), (4016, 69935), (5020, 55948), (5680, 49447), (7880, 35642), (10040, 27974), (13987, 20080), (15760, 17821)]