20515900

素因数分解:

$2^2\times 5^2\times {\mathrm{193}}^1\times {\mathrm{1063}}^1$

素因数の和:1270

約数の個数: 36

約数和(自身を含む): 44792272

約数和(自身を除く): 24276372

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 193, 386, 772, 965, 1063, 1930, 2126, 3860, 4252, 4825, 5315, 9650, 10630, 19300, 21260, 26575, 53150, 106300, 205159, 410318, 820636, 1025795, 2051590, 4103180, 5128975, 10257950, 20515900]

約数ペア:

[(1, 20515900), (2, 10257950), (4, 5128975), (5, 4103180), (10, 2051590), (20, 1025795), (25, 820636), (50, 410318), (100, 205159), (193, 106300), (386, 53150), (772, 26575), (965, 21260), (1063, 19300), (1930, 10630), (2126, 9650), (3860, 5315), (4252, 4825)]