28708520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16691}}^1$

素因数の和:16745

約数の個数: 32

約数和(自身を含む): 66100320

約数和(自身を除く): 37391800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 16691, 33382, 66764, 83455, 133528, 166910, 333820, 667640, 717713, 1435426, 2870852, 3588565, 5741704, 7177130, 14354260, 28708520]

約数ペア:

[(1, 28708520), (2, 14354260), (4, 7177130), (5, 5741704), (8, 3588565), (10, 2870852), (20, 1435426), (40, 717713), (43, 667640), (86, 333820), (172, 166910), (215, 133528), (344, 83455), (430, 66764), (860, 33382), (1720, 16691)]