20070280

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 27207800

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 71, 74, 142, 148, 185, 191, 284, 296, 355, 370, 382, 568, 710, 740, 764, 955, 1420, 1480, 1528, 1910, 2627, 2840, 3820, 5254, 7067, 7640, 10508, 13135, 13561, 14134, 21016, 26270, 27122, 28268, 35335, 52540, 54244, 56536, 67805, 70670, 105080, 108488, 135610, 141340, 271220, 282680, 501757, 542440, 1003514, 2007028, 2508785, 4014056, 5017570, 10035140, 20070280]

約数ペア:

[(1, 20070280), (2, 10035140), (4, 5017570), (5, 4014056), (8, 2508785), (10, 2007028), (20, 1003514), (37, 542440), (40, 501757), (71, 282680), (74, 271220), (142, 141340), (148, 135610), (185, 108488), (191, 105080), (284, 70670), (296, 67805), (355, 56536), (370, 54244), (382, 52540), (568, 35335), (710, 28268), (740, 27122), (764, 26270), (955, 21016), (1420, 14134), (1480, 13561), (1528, 13135), (1910, 10508), (2627, 7640), (2840, 7067), (3820, 5254)]