21151180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55661}}^1$

素因数の和:55689

約数の個数: 24

約数和(自身を含む): 46756080

約数和(自身を除く): 25604900

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55661, 111322, 222644, 278305, 556610, 1057559, 1113220, 2115118, 4230236, 5287795, 10575590, 21151180]

約数ペア:

[(1, 21151180), (2, 10575590), (4, 5287795), (5, 4230236), (10, 2115118), (19, 1113220), (20, 1057559), (38, 556610), (76, 278305), (95, 222644), (190, 111322), (380, 55661)]