25879640

素因数分解:

$2^3\times 5^1\times {\mathrm{646991}}^1$

素因数の和:647002

約数の個数: 16

約数和(自身を含む): 58229280

約数和(自身を除く): 32349640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 646991, 1293982, 2587964, 3234955, 5175928, 6469910, 12939820, 25879640]

約数ペア:

[(1, 25879640), (2, 12939820), (4, 6469910), (5, 5175928), (8, 3234955), (10, 2587964), (20, 1293982), (40, 646991)]