21509704

素因数分解:

$2^3\times {\mathrm{331}}^1\times {\mathrm{8123}}^1$

素因数の和:8460

約数の個数: 16

約数和(自身を含む): 40457520

約数和(自身を除く): 18947816

約数列:

[1, 2, 4, 8, 331, 662, 1324, 2648, 8123, 16246, 32492, 64984, 2688713, 5377426, 10754852, 21509704]

約数ペア:

[(1, 21509704), (2, 10754852), (4, 5377426), (8, 2688713), (331, 64984), (662, 32492), (1324, 16246), (2648, 8123)]