219628520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127691}}^1$

素因数の和:127745

約数の個数: 32

約数和(自身を含む): 505660320

約数和(自身を除く): 286031800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 127691, 255382, 510764, 638455, 1021528, 1276910, 2553820, 5107640, 5490713, 10981426, 21962852, 27453565, 43925704, 54907130, 109814260, 219628520]

約数ペア:

[(1, 219628520), (2, 109814260), (4, 54907130), (5, 43925704), (8, 27453565), (10, 21962852), (20, 10981426), (40, 5490713), (43, 5107640), (86, 2553820), (172, 1276910), (215, 1021528), (344, 638455), (430, 510764), (860, 255382), (1720, 127691)]