18806008

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{857}}^1$

素因数の和:1087

約数の個数: 32

約数和(自身を含む): 38198160

約数和(自身を除く): 19392152

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211, 422, 844, 857, 1688, 1714, 2743, 3428, 5486, 6856, 10972, 11141, 21944, 22282, 44564, 89128, 180827, 361654, 723308, 1446616, 2350751, 4701502, 9403004, 18806008]

約数ペア:

[(1, 18806008), (2, 9403004), (4, 4701502), (8, 2350751), (13, 1446616), (26, 723308), (52, 361654), (104, 180827), (211, 89128), (422, 44564), (844, 22282), (857, 21944), (1688, 11141), (1714, 10972), (2743, 6856), (3428, 5486)]