19616720

素因数分解:

$2^4\times 5^1\times {\mathrm{245209}}^1$

素因数の和:245222

約数の個数: 20

約数和(自身を含む): 45609060

約数和(自身を除く): 25992340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245209, 490418, 980836, 1226045, 1961672, 2452090, 3923344, 4904180, 9808360, 19616720]

約数ペア:

[(1, 19616720), (2, 9808360), (4, 4904180), (5, 3923344), (8, 2452090), (10, 1961672), (16, 1226045), (20, 980836), (40, 490418), (80, 245209)]