21000824

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{1787}}^1$

素因数の和:1919

約数の個数: 32

約数和(自身を含む): 42804720

約数和(自身を除く): 21803896

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 113, 226, 452, 904, 1469, 1787, 2938, 3574, 5876, 7148, 11752, 14296, 23231, 46462, 92924, 185848, 201931, 403862, 807724, 1615448, 2625103, 5250206, 10500412, 21000824]

約数ペア:

[(1, 21000824), (2, 10500412), (4, 5250206), (8, 2625103), (13, 1615448), (26, 807724), (52, 403862), (104, 201931), (113, 185848), (226, 92924), (452, 46462), (904, 23231), (1469, 14296), (1787, 11752), (2938, 7148), (3574, 5876)]