20644720

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{1709}}^1$

素因数の和:1873

約数の個数: 40

約数和(自身を含む): 48345120

約数和(自身を除く): 27700400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 302, 604, 755, 1208, 1510, 1709, 2416, 3020, 3418, 6040, 6836, 8545, 12080, 13672, 17090, 27344, 34180, 68360, 136720, 258059, 516118, 1032236, 1290295, 2064472, 2580590, 4128944, 5161180, 10322360, 20644720]

約数ペア:

[(1, 20644720), (2, 10322360), (4, 5161180), (5, 4128944), (8, 2580590), (10, 2064472), (16, 1290295), (20, 1032236), (40, 516118), (80, 258059), (151, 136720), (302, 68360), (604, 34180), (755, 27344), (1208, 17090), (1510, 13672), (1709, 12080), (2416, 8545), (3020, 6836), (3418, 6040)]