19429904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{857}}^1$

素因数の和:987

約数の個数: 40

約数和(自身を含む): 40960920

約数和(自身を除く): 21531016

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 109, 208, 218, 436, 857, 872, 1417, 1714, 1744, 2834, 3428, 5668, 6856, 11141, 11336, 13712, 22282, 22672, 44564, 89128, 93413, 178256, 186826, 373652, 747304, 1214369, 1494608, 2428738, 4857476, 9714952, 19429904]

約数ペア:

[(1, 19429904), (2, 9714952), (4, 4857476), (8, 2428738), (13, 1494608), (16, 1214369), (26, 747304), (52, 373652), (104, 186826), (109, 178256), (208, 93413), (218, 89128), (436, 44564), (857, 22672), (872, 22282), (1417, 13712), (1714, 11336), (1744, 11141), (2834, 6856), (3428, 5668)]