20657900

素因数分解:

$2^2\times 5^2\times {\mathrm{167}}^1\times {\mathrm{1237}}^1$

素因数の和:1418

約数の個数: 36

約数和(自身を含む): 45132528

約数和(自身を除く): 24474628

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 167, 334, 668, 835, 1237, 1670, 2474, 3340, 4175, 4948, 6185, 8350, 12370, 16700, 24740, 30925, 61850, 123700, 206579, 413158, 826316, 1032895, 2065790, 4131580, 5164475, 10328950, 20657900]

約数ペア:

[(1, 20657900), (2, 10328950), (4, 5164475), (5, 4131580), (10, 2065790), (20, 1032895), (25, 826316), (50, 413158), (100, 206579), (167, 123700), (334, 61850), (668, 30925), (835, 24740), (1237, 16700), (1670, 12370), (2474, 8350), (3340, 6185), (4175, 4948)]