20452720

素因数分解:

$2^4\times 5^1\times {\mathrm{255659}}^1$

素因数の和:255672

約数の個数: 20

約数和(自身を含む): 47552760

約数和(自身を除く): 27100040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255659, 511318, 1022636, 1278295, 2045272, 2556590, 4090544, 5113180, 10226360, 20452720]

約数ペア:

[(1, 20452720), (2, 10226360), (4, 5113180), (5, 4090544), (8, 2556590), (10, 2045272), (16, 1278295), (20, 1022636), (40, 511318), (80, 255659)]