19903208

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{907}}^1$

素因数の和:1137

約数の個数: 32

約数和(自身を含む): 40424160

約数和(自身を除く): 20520952

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211, 422, 844, 907, 1688, 1814, 2743, 3628, 5486, 7256, 10972, 11791, 21944, 23582, 47164, 94328, 191377, 382754, 765508, 1531016, 2487901, 4975802, 9951604, 19903208]

約数ペア:

[(1, 19903208), (2, 9951604), (4, 4975802), (8, 2487901), (13, 1531016), (26, 765508), (52, 382754), (104, 191377), (211, 94328), (422, 47164), (844, 23582), (907, 21944), (1688, 11791), (1814, 10972), (2743, 7256), (3628, 5486)]