21627920

素因数分解:

$2^4\times 5^1\times {\mathrm{409}}^1\times {\mathrm{661}}^1$

素因数の和:1083

約数の個数: 40

約数和(自身を含む): 50484120

約数和(自身を除く): 28856200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 409, 661, 818, 1322, 1636, 2045, 2644, 3272, 3305, 4090, 5288, 6544, 6610, 8180, 10576, 13220, 16360, 26440, 32720, 52880, 270349, 540698, 1081396, 1351745, 2162792, 2703490, 4325584, 5406980, 10813960, 21627920]

約数ペア:

[(1, 21627920), (2, 10813960), (4, 5406980), (5, 4325584), (8, 2703490), (10, 2162792), (16, 1351745), (20, 1081396), (40, 540698), (80, 270349), (409, 52880), (661, 32720), (818, 26440), (1322, 16360), (1636, 13220), (2045, 10576), (2644, 8180), (3272, 6610), (3305, 6544), (4090, 5288)]