720640

素因数分解:

$2^8\times 5^1\times {\mathrm{563}}^1$

素因数の和:584

約数の個数: 36

約数和(自身を含む): 1729224

約数和(自身を除く): 1008584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 563, 640, 1126, 1280, 2252, 2815, 4504, 5630, 9008, 11260, 18016, 22520, 36032, 45040, 72064, 90080, 144128, 180160, 360320, 720640]

約数ペア:

[(1, 720640), (2, 360320), (4, 180160), (5, 144128), (8, 90080), (10, 72064), (16, 45040), (20, 36032), (32, 22520), (40, 18016), (64, 11260), (80, 9008), (128, 5630), (160, 4504), (256, 2815), (320, 2252), (563, 1280), (640, 1126)]