20986750

素因数分解:

$2^1\times 5^3\times {\mathrm{127}}^1\times {\mathrm{661}}^1$

素因数の和:805

約数の個数: 32

約数和(自身を含む): 39656448

約数和(自身を除く): 18669698

約数列:

[1, 2, 5, 10, 25, 50, 125, 127, 250, 254, 635, 661, 1270, 1322, 3175, 3305, 6350, 6610, 15875, 16525, 31750, 33050, 82625, 83947, 165250, 167894, 419735, 839470, 2098675, 4197350, 10493375, 20986750]

約数ペア:

[(1, 20986750), (2, 10493375), (5, 4197350), (10, 2098675), (25, 839470), (50, 419735), (125, 167894), (127, 165250), (250, 83947), (254, 82625), (635, 33050), (661, 31750), (1270, 16525), (1322, 15875), (3175, 6610), (3305, 6350)]