21127964

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{859}}^1$

素因数の和:930

約数の個数: 48

約数和(自身を含む): 44499840

約数和(自身を除く): 23371876

約数列:

[1, 2, 4, 11, 13, 22, 26, 43, 44, 52, 86, 143, 172, 286, 473, 559, 572, 859, 946, 1118, 1718, 1892, 2236, 3436, 6149, 9449, 11167, 12298, 18898, 22334, 24596, 36937, 37796, 44668, 73874, 122837, 147748, 245674, 406307, 480181, 491348, 812614, 960362, 1625228, 1920724, 5281991, 10563982, 21127964]

約数ペア:

[(1, 21127964), (2, 10563982), (4, 5281991), (11, 1920724), (13, 1625228), (22, 960362), (26, 812614), (43, 491348), (44, 480181), (52, 406307), (86, 245674), (143, 147748), (172, 122837), (286, 73874), (473, 44668), (559, 37796), (572, 36937), (859, 24596), (946, 22334), (1118, 18898), (1718, 12298), (1892, 11167), (2236, 9449), (3436, 6149)]