20430800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{3929}}^1$

素因数の和:3960

約数の個数: 60

約数和(自身を含む): 52874220

約数和(自身を除く): 32443420

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 3929, 5200, 7858, 15716, 19645, 31432, 39290, 51077, 62864, 78580, 98225, 102154, 157160, 196450, 204308, 255385, 314320, 392900, 408616, 510770, 785800, 817232, 1021540, 1276925, 1571600, 2043080, 2553850, 4086160, 5107700, 10215400, 20430800]

約数ペア:

[(1, 20430800), (2, 10215400), (4, 5107700), (5, 4086160), (8, 2553850), (10, 2043080), (13, 1571600), (16, 1276925), (20, 1021540), (25, 817232), (26, 785800), (40, 510770), (50, 408616), (52, 392900), (65, 314320), (80, 255385), (100, 204308), (104, 196450), (130, 157160), (200, 102154), (208, 98225), (260, 78580), (325, 62864), (400, 51077), (520, 39290), (650, 31432), (1040, 19645), (1300, 15716), (2600, 7858), (3929, 5200)]