661648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{3181}}^1$

素因数の和:3202

約数の個数: 20

約数和(自身を含む): 1380988

約数和(自身を除く): 719340

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 3181, 6362, 12724, 25448, 41353, 50896, 82706, 165412, 330824, 661648]

約数ペア:

[(1, 661648), (2, 330824), (4, 165412), (8, 82706), (13, 50896), (16, 41353), (26, 25448), (52, 12724), (104, 6362), (208, 3181)]