19808980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43063}}^1$

素因数の和:43095

約数の個数: 24

約数和(自身を含む): 43408512

約数和(自身を除く): 23599532

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 43063, 86126, 172252, 215315, 430630, 861260, 990449, 1980898, 3961796, 4952245, 9904490, 19808980]

約数ペア:

[(1, 19808980), (2, 9904490), (4, 4952245), (5, 3961796), (10, 1980898), (20, 990449), (23, 861260), (46, 430630), (92, 215315), (115, 172252), (230, 86126), (460, 43063)]