20816720

素因数分解:

$2^4\times 5^1\times {\mathrm{260209}}^1$

素因数の和:260222

約数の個数: 20

約数和(自身を含む): 48399060

約数和(自身を除く): 27582340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260209, 520418, 1040836, 1301045, 2081672, 2602090, 4163344, 5204180, 10408360, 20816720]

約数ペア:

[(1, 20816720), (2, 10408360), (4, 5204180), (5, 4163344), (8, 2602090), (10, 2081672), (16, 1301045), (20, 1040836), (40, 520418), (80, 260209)]