21561584

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{122509}}^1$

素因数の和:122528

約数の個数: 20

約数和(自身を含む): 45573720

約数和(自身を除く): 24012136

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 122509, 245018, 490036, 980072, 1347599, 1960144, 2695198, 5390396, 10780792, 21561584]

約数ペア:

[(1, 21561584), (2, 10780792), (4, 5390396), (8, 2695198), (11, 1960144), (16, 1347599), (22, 980072), (44, 490036), (88, 245018), (176, 122509)]