18687910

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{26321}}^1$

素因数の和:26399

約数の個数: 16

約数和(自身を含む): 34113312

約数和(自身を除く): 15425402

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 26321, 52642, 131605, 263210, 1868791, 3737582, 9343955, 18687910]

約数ペア:

[(1, 18687910), (2, 9343955), (5, 3737582), (10, 1868791), (71, 263210), (142, 131605), (355, 52642), (710, 26321)]