21881255

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20939}}^1$

素因数の和:20974

約数の個数: 16

約数和(自身を含む): 30153600

約数和(自身を除く): 8272345

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20939, 104695, 230329, 397841, 1151645, 1989205, 4376251, 21881255]

約数ペア:

[(1, 21881255), (5, 4376251), (11, 1989205), (19, 1151645), (55, 397841), (95, 230329), (209, 104695), (1045, 20939)]