21488180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153487}}^1$

素因数の和:153503

約数の個数: 24

約数和(自身を含む): 51571968

約数和(自身を除く): 30083788

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153487, 306974, 613948, 767435, 1074409, 1534870, 2148818, 3069740, 4297636, 5372045, 10744090, 21488180]

約数ペア:

[(1, 21488180), (2, 10744090), (4, 5372045), (5, 4297636), (7, 3069740), (10, 2148818), (14, 1534870), (20, 1074409), (28, 767435), (35, 613948), (70, 306974), (140, 153487)]