131478520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{76441}}^1$

素因数の和:76495

約数の個数: 32

約数和(自身を含む): 302710320

約数和(自身を除く): 171231800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 76441, 152882, 305764, 382205, 611528, 764410, 1528820, 3057640, 3286963, 6573926, 13147852, 16434815, 26295704, 32869630, 65739260, 131478520]

約数ペア:

[(1, 131478520), (2, 65739260), (4, 32869630), (5, 26295704), (8, 16434815), (10, 13147852), (20, 6573926), (40, 3286963), (43, 3057640), (86, 1528820), (172, 764410), (215, 611528), (344, 382205), (430, 305764), (860, 152882), (1720, 76441)]