81536720

素因数分解:

$2^4\times 5^1\times {\mathrm{1019209}}^1$

素因数の和:1019222

約数の個数: 20

約数和(自身を含む): 189573060

約数和(自身を除く): 108036340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019209, 2038418, 4076836, 5096045, 8153672, 10192090, 16307344, 20384180, 40768360, 81536720]

約数ペア:

[(1, 81536720), (2, 40768360), (4, 20384180), (5, 16307344), (8, 10192090), (10, 8153672), (16, 5096045), (20, 4076836), (40, 2038418), (80, 1019209)]