278891997

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{68507}}^1$

素因数の和:68592

約数の個数: 16

約数和(自身を含む): 394606080

約数和(自身を除く): 115714083

約数列:

[1, 3, 23, 59, 69, 177, 1357, 4071, 68507, 205521, 1575661, 4041913, 4726983, 12125739, 92963999, 278891997]

約数ペア:

[(1, 278891997), (3, 92963999), (23, 12125739), (59, 4726983), (69, 4041913), (177, 1575661), (1357, 205521), (4071, 68507)]