205651840

素因数分解:

$2^7\times 5^1\times {\mathrm{321331}}^1$

素因数の和:321350

約数の個数: 32

約数和(自身を含む): 491637960

約数和(自身を除く): 285986120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 321331, 642662, 1285324, 1606655, 2570648, 3213310, 5141296, 6426620, 10282592, 12853240, 20565184, 25706480, 41130368, 51412960, 102825920, 205651840]

約数ペア:

[(1, 205651840), (2, 102825920), (4, 51412960), (5, 41130368), (8, 25706480), (10, 20565184), (16, 12853240), (20, 10282592), (32, 6426620), (40, 5141296), (64, 3213310), (80, 2570648), (128, 1606655), (160, 1285324), (320, 642662), (640, 321331)]