1280821720

素因数分解:

$2^3\times 5^1\times {\mathrm{32020543}}^1$

素因数の和:32020554

約数の個数: 16

約数和(自身を含む): 2881848960

約数和(自身を除く): 1601027240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 32020543, 64041086, 128082172, 160102715, 256164344, 320205430, 640410860, 1280821720]

約数ペア:

[(1, 1280821720), (2, 640410860), (4, 320205430), (5, 256164344), (8, 160102715), (10, 128082172), (20, 64041086), (40, 32020543)]