128577920

素因数分解:

$2^7\times 5^1\times {\mathrm{200903}}^1$

素因数の和:200922

約数の個数: 32

約数和(自身を含む): 307383120

約数和(自身を除く): 178805200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 200903, 401806, 803612, 1004515, 1607224, 2009030, 3214448, 4018060, 6428896, 8036120, 12857792, 16072240, 25715584, 32144480, 64288960, 128577920]

約数ペア:

[(1, 128577920), (2, 64288960), (4, 32144480), (5, 25715584), (8, 16072240), (10, 12857792), (16, 8036120), (20, 6428896), (32, 4018060), (40, 3214448), (64, 2009030), (80, 1607224), (128, 1004515), (160, 803612), (320, 401806), (640, 200903)]