403840

素因数分解:

$2^7\times 5^1\times {\mathrm{631}}^1$

素因数の和:650

約数の個数: 32

約数和(自身を含む): 966960

約数和(自身を除く): 563120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 631, 640, 1262, 2524, 3155, 5048, 6310, 10096, 12620, 20192, 25240, 40384, 50480, 80768, 100960, 201920, 403840]

約数ペア:

[(1, 403840), (2, 201920), (4, 100960), (5, 80768), (8, 50480), (10, 40384), (16, 25240), (20, 20192), (32, 12620), (40, 10096), (64, 6310), (80, 5048), (128, 3155), (160, 2524), (320, 1262), (631, 640)]