18782608

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1237}}^1$

素因数の和:1331

約数の個数: 40

約数和(自身を含む): 39759608

約数和(自身を除く): 20977000

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 146, 208, 292, 584, 949, 1168, 1237, 1898, 2474, 3796, 4948, 7592, 9896, 15184, 16081, 19792, 32162, 64324, 90301, 128648, 180602, 257296, 361204, 722408, 1173913, 1444816, 2347826, 4695652, 9391304, 18782608]

約数ペア:

[(1, 18782608), (2, 9391304), (4, 4695652), (8, 2347826), (13, 1444816), (16, 1173913), (26, 722408), (52, 361204), (73, 257296), (104, 180602), (146, 128648), (208, 90301), (292, 64324), (584, 32162), (949, 19792), (1168, 16081), (1237, 15184), (1898, 9896), (2474, 7592), (3796, 4948)]