657920

素因数分解:

$2^9\times 5^1\times {\mathrm{257}}^1$

素因数の和:280

約数の個数: 40

約数和(自身を含む): 1583604

約数和(自身を除く): 925684

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 257, 320, 512, 514, 640, 1028, 1280, 1285, 2056, 2560, 2570, 4112, 5140, 8224, 10280, 16448, 20560, 32896, 41120, 65792, 82240, 131584, 164480, 328960, 657920]

約数ペア:

[(1, 657920), (2, 328960), (4, 164480), (5, 131584), (8, 82240), (10, 65792), (16, 41120), (20, 32896), (32, 20560), (40, 16448), (64, 10280), (80, 8224), (128, 5140), (160, 4112), (256, 2570), (257, 2560), (320, 2056), (512, 1285), (514, 1280), (640, 1028)]