20645720

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{22441}}^1$

素因数の和:22475

約数の個数: 32

約数和(自身を含む): 48474720

約数和(自身を除く): 27829000

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 22441, 44882, 89764, 112205, 179528, 224410, 448820, 516143, 897640, 1032286, 2064572, 2580715, 4129144, 5161430, 10322860, 20645720]

約数ペア:

[(1, 20645720), (2, 10322860), (4, 5161430), (5, 4129144), (8, 2580715), (10, 2064572), (20, 1032286), (23, 897640), (40, 516143), (46, 448820), (92, 224410), (115, 179528), (184, 112205), (230, 89764), (460, 44882), (920, 22441)]