16239640

素因数分解:

$2^3\times 5^1\times {\mathrm{405991}}^1$

素因数の和:406002

約数の個数: 16

約数和(自身を含む): 36539280

約数和(自身を除く): 20299640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 405991, 811982, 1623964, 2029955, 3247928, 4059910, 8119820, 16239640]

約数ペア:

[(1, 16239640), (2, 8119820), (4, 4059910), (5, 3247928), (8, 2029955), (10, 1623964), (20, 811982), (40, 405991)]