15903980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{18493}}^1$

素因数の和:18545

約数の個数: 24

約数和(自身を含む): 34176912

約数和(自身を除く): 18272932

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 18493, 36986, 73972, 92465, 184930, 369860, 795199, 1590398, 3180796, 3975995, 7951990, 15903980]

約数ペア:

[(1, 15903980), (2, 7951990), (4, 3975995), (5, 3180796), (10, 1590398), (20, 795199), (43, 369860), (86, 184930), (172, 92465), (215, 73972), (430, 36986), (860, 18493)]