19900304

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{3041}}^1$

素因数の和:3458

約数の個数: 20

約数和(自身を含む): 38663820

約数和(自身を除く): 18763516

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3041, 3272, 6082, 6544, 12164, 24328, 48656, 1243769, 2487538, 4975076, 9950152, 19900304]

約数ペア:

[(1, 19900304), (2, 9950152), (4, 4975076), (8, 2487538), (16, 1243769), (409, 48656), (818, 24328), (1636, 12164), (3041, 6544), (3272, 6082)]