1643440

素因数分解:

$2^4\times 5^1\times {\mathrm{20543}}^1$

素因数の和:20556

約数の個数: 20

約数和(自身を含む): 3821184

約数和(自身を除く): 2177744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 20543, 41086, 82172, 102715, 164344, 205430, 328688, 410860, 821720, 1643440]

約数ペア:

[(1, 1643440), (2, 821720), (4, 410860), (5, 328688), (8, 205430), (10, 164344), (16, 102715), (20, 82172), (40, 41086), (80, 20543)]