20512780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2347}}^1$

素因数の和:2398

約数の個数: 48

約数和(自身を含む): 47335680

約数和(自身を除く): 26822900

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 380, 437, 460, 874, 1748, 2185, 2347, 4370, 4694, 8740, 9388, 11735, 23470, 44593, 46940, 53981, 89186, 107962, 178372, 215924, 222965, 269905, 445930, 539810, 891860, 1025639, 1079620, 2051278, 4102556, 5128195, 10256390, 20512780]

約数ペア:

[(1, 20512780), (2, 10256390), (4, 5128195), (5, 4102556), (10, 2051278), (19, 1079620), (20, 1025639), (23, 891860), (38, 539810), (46, 445930), (76, 269905), (92, 222965), (95, 215924), (115, 178372), (190, 107962), (230, 89186), (380, 53981), (437, 46940), (460, 44593), (874, 23470), (1748, 11735), (2185, 9388), (2347, 8740), (4370, 4694)]