21536720

素因数分解:

$2^4\times 5^1\times {\mathrm{269209}}^1$

素因数の和:269222

約数の個数: 20

約数和(自身を含む): 50073060

約数和(自身を除く): 28536340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269209, 538418, 1076836, 1346045, 2153672, 2692090, 4307344, 5384180, 10768360, 21536720]

約数ペア:

[(1, 21536720), (2, 10768360), (4, 5384180), (5, 4307344), (8, 2692090), (10, 2153672), (16, 1346045), (20, 1076836), (40, 538418), (80, 269209)]