19400720

素因数分解:

$2^4\times 5^1\times {\mathrm{242509}}^1$

素因数の和:242522

約数の個数: 20

約数和(自身を含む): 45106860

約数和(自身を除く): 25706140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 242509, 485018, 970036, 1212545, 1940072, 2425090, 3880144, 4850180, 9700360, 19400720]

約数ペア:

[(1, 19400720), (2, 9700360), (4, 4850180), (5, 3880144), (8, 2425090), (10, 1940072), (16, 1212545), (20, 970036), (40, 485018), (80, 242509)]