18639940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{439}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 43021440

約数和(自身を除く): 24381500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 193, 220, 386, 439, 772, 878, 965, 1756, 1930, 2123, 2195, 3860, 4246, 4390, 4829, 8492, 8780, 9658, 10615, 19316, 21230, 24145, 42460, 48290, 84727, 96580, 169454, 338908, 423635, 847270, 931997, 1694540, 1863994, 3727988, 4659985, 9319970, 18639940]

約数ペア:

[(1, 18639940), (2, 9319970), (4, 4659985), (5, 3727988), (10, 1863994), (11, 1694540), (20, 931997), (22, 847270), (44, 423635), (55, 338908), (110, 169454), (193, 96580), (220, 84727), (386, 48290), (439, 42460), (772, 24145), (878, 21230), (965, 19316), (1756, 10615), (1930, 9658), (2123, 8780), (2195, 8492), (3860, 4829), (4246, 4390)]