21808715

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{2671}}^1$

素因数の和:2770

約数の個数: 16

約数和(自身を含む): 27703296

約数和(自身を除く): 5894581

約数列:

[1, 5, 23, 71, 115, 355, 1633, 2671, 8165, 13355, 61433, 189641, 307165, 948205, 4361743, 21808715]

約数ペア:

[(1, 21808715), (5, 4361743), (23, 948205), (71, 307165), (115, 189641), (355, 61433), (1633, 13355), (2671, 8165)]