12720440

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{653}}^1$

素因数の和:1151

約数の個数: 32

約数和(自身を含む): 28723680

約数和(自身を除く): 16003240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 653, 974, 1306, 1948, 2435, 2612, 3265, 3896, 4870, 5224, 6530, 9740, 13060, 19480, 26120, 318011, 636022, 1272044, 1590055, 2544088, 3180110, 6360220, 12720440]

約数ペア:

[(1, 12720440), (2, 6360220), (4, 3180110), (5, 2544088), (8, 1590055), (10, 1272044), (20, 636022), (40, 318011), (487, 26120), (653, 19480), (974, 13060), (1306, 9740), (1948, 6530), (2435, 5224), (2612, 4870), (3265, 3896)]