20456720

素因数分解:

$2^4\times 5^1\times {\mathrm{255709}}^1$

素因数の和:255722

約数の個数: 20

約数和(自身を含む): 47562060

約数和(自身を除く): 27105340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255709, 511418, 1022836, 1278545, 2045672, 2557090, 4091344, 5114180, 10228360, 20456720]

約数ペア:

[(1, 20456720), (2, 10228360), (4, 5114180), (5, 4091344), (8, 2557090), (10, 2045672), (16, 1278545), (20, 1022836), (40, 511418), (80, 255709)]