19813540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23039}}^1$

素因数の和:23091

約数の個数: 24

約数和(自身を含む): 42577920

約数和(自身を除く): 22764380

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23039, 46078, 92156, 115195, 230390, 460780, 990677, 1981354, 3962708, 4953385, 9906770, 19813540]

約数ペア:

[(1, 19813540), (2, 9906770), (4, 4953385), (5, 3962708), (10, 1981354), (20, 990677), (43, 460780), (86, 230390), (172, 115195), (215, 92156), (430, 46078), (860, 23039)]