21434120

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1723}}^1$

素因数の和:2045

約数の個数: 32

約数和(自身を含む): 48409920

約数和(自身を除く): 26975800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 1723, 2488, 3110, 3446, 6220, 6892, 8615, 12440, 13784, 17230, 34460, 68920, 535853, 1071706, 2143412, 2679265, 4286824, 5358530, 10717060, 21434120]

約数ペア:

[(1, 21434120), (2, 10717060), (4, 5358530), (5, 4286824), (8, 2679265), (10, 2143412), (20, 1071706), (40, 535853), (311, 68920), (622, 34460), (1244, 17230), (1555, 13784), (1723, 12440), (2488, 8615), (3110, 6892), (3446, 6220)]